ONC01 - Master/Chief Mate Unlimited Tonnage

INLAND ONLY Which term is NOT defined in the Inland Navigation Rules?

You are in charge of a towing vessel that operates exclusively on inland waters. You regularly tow barges that provide ...

While on cargo watch, you notice one of the containers of Class 1 explosive materials has been damaged and some of the ...

When attempting to enter a compartment containing a fire, which method of applying water is best?

Using the information in Section 1, the blue pages, of the Stability Data Reference Book, determine the danger angle fo...

How are chart legends which indicate a conspicuous landmark printed?

Why are low altitude sun sights not generally used?

Determine the approximate geographic visibility of an object, with a height above the water of 85 feet (25.9 meters), f...

If the speed necessary for reaching port at a designated time is 21.6 knots and the pitch of the propeller is 22.5 feet,...

Determine the great circle distance and initial course from LAT 35°08.0'S, LONG 19°26.0'E to LAT 33°16.0'S, LONG 115°36...

INLAND ONLY Which of the following may be displayed by a law enforcement boat?

In writing up the logbook at the end of your watch, you make an error in writing an entry. What is the proper means of ...

What best describes for how long a gas-free test is good?

Your cargo vessel is transiting pirate waters with a temporary security team onboard. The ship has been attacked and st...

Your sailing drafts are: FWD 21'-08", AFT 22'-04" and the GM is 3.2 feet. What will be the angle of list if the #6 port...

What is the purpose of the "reference hand" on an aneroid barometer?

The light characteristic of flashing is used in the Aids to Navigation System on the Western Rivers. Which example is r...

The following questions are to be answered using Chart 12354TR, Long Island Sound - Eastern Part, and supporting public...

On 22 February your 2045 ZT position is LAT 33°19'N, LONG 52°06'W. You observe Polaris bearing 358.1°pgc. At the time of...

On 5 May at 1953 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 29°30.0'N, LONG...

INLAND ONLY Which of the following is indicated by a vessel displaying a flashing blue light?

The American Consul has asked the Master of a vessel bound for a port in the U.S. to transport a destitute seaman back ...

What is an enclosure which will withstand ignition of a flammable gas, and which will prevent the transmission of any f...

Your vessel is damaged and listing to port. The rolling period is long, and the vessel will occasionally assume a starb...

The SS AMERICAN MARINER is ready to bunker with drafts of FWD 14'-04", AFT 17'-06". After all bunkers are on board, sou...

Charts should be corrected by using information published in which text?

During the month of October, which describes the Sun's declination?

At 1000 buoy "PI" is abeam to starboard a distance of 0.5 mile. From this position, with a set of 295° and a drift of 1...

Your vessel is steering course 352°psc, variation for the area is 11°E, and deviation is 9°W. The wind is from the north...

On 13 September your 1830 ZT DR position was LAT 23°03'S, LONG 105°16'E when you observed a faint unidentifiable star t...

BOTH INTERNATIONAL & INLAND By definition which vessel is unable to keep out of the way of another vessel?

Firefighting equipment requirements for a particular vessel may be found on which document?

You are preparing to load a heavy cargo with abnormal physical dimensions onboard your vessel. Which of the following i...

The terms "ceiling" and "margin plate" are associated with which areas of the vessel?

Use the floodable length curve in Section 1, the blue pages, of the Stability Data Reference Book. If the curve represe...

You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 100°T, 120 miles from ...

Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates ...

At 1130, Horton Point Light bears 172°T at a range of 3.45nm the fathometer reads 81 ft. Which of the following describ...

You have steamed 632 miles at 18.5 knots and consumed 197 tons of fuel. If you have 278 tons of usable fuel remaining, h...

On 25 December your 0330 ZT DR position is LAT 25°15.0'N, LONG 32°16.0'W. You are on course 145°T at a speed of 20 knot...

BOTH INTERNATIONAL & INLAND A vessel that is defined as "restricted in her ability to maneuver" is unable to keep out o...

Each crewmember has an assigned firefighting station. Where is this assignment listed?

What is NOT required as special safety equipment on a tankship carrying hazardous cargoes in bulk?

Which type of weld testing can be used to detect internal flaws?

You are loading in a port subject to the summer load line mark and bound for a port subject to the tropical load line m...

You are on course 042°T. To check the course of your vessel you should observe a celestial body on which bearing?

How often is The Local Notice to Mariners updated?

At 1155 your vessel's position is LAT 41°09.0'N, LONG 72°34.4'W. If you make good a course of 282°T and a speed of 10.0 ...

You are taking a time tick using the 2000 signal from Kekaha-Kauai, Hawaii (WWVH). You hear a series of 1 second dashes ...

On 15 November your 1030 ZT DR position is LAT 19°41'S, LONG 41°37'W. You are on course 239°T, speed 22 knots. Determin...

INTERNATIONAL ONLY You intend to overtake a vessel in a narrow channel on its port side. The vessel to be overtaken has...

Which statement concerning an accidental oil spill in the navigable waters of the U.S. is TRUE?

A half-height container is used __________.

What quality of a diesel fuel is most significant for efficient combustion?

Your drafts are: FWD 24'-09", AFT 27'-02". Use the blue pages of the Stability Data Reference Book to determine the ves...

If the gyrocompass error is east, what describes the error and the correction to be made to gyrocompass headings to obt...

Ascending and descending air masses with different temperatures is part of an important heat transmitting process in ou...

From your 1155 position, you steer a course of 282°T at a speed of 9.5 knots. You obtain the following bearings: 1205: F...

On 10 November 2023 at 0130, you are inbound at Charleston Harbor Entrance Buoy “10” (ACT6611). What is the direction an...

On 9 September your 2043 ZT position is LAT 24°18'N, LONG 66°46'W. You observe Polaris bearing 001°pgc. At the time of ...

INTERNATIONAL ONLY You are operating a vessel in a narrow channel. Your vessel must stay within the channel to be navig...

Which term defines when a vessel is swinging from side to side off course due to quartering seas?

Maritime Administration personnel may be allowed in the pilothouse and on the navigation bridge. Who is responsible for...

If you were being assisted by an icebreaker and he sent you the single letter "Q", what would he be telling you?

A cargo vessel of 9,000 tons displacement is carrying a slack deep tank of molasses (SG 1.4). The tank measures 20 feet...

By what means are indications of the master gyrocompass sent to remote repeaters?

Which kind of conditions would you observe as the eye of a storm passes over your vessel's position?

At 1245 the GPS shows your position to be LAT 41°10.3'N, LONG 72°44.2'W. You are steering a course of 284°T at an engine...

A vessel at LAT 40°42.0'N, LONG 74°01.0'W, heads for a destination at LAT 14°41.0'N, LONG 17°26.0'W. Determine the true ...

Determine the distance from LAT 19°54.0'N, LONG 166°36.0'E to LAT 19°54.0'N, LONG 157°54.0'W, by parallel sailing.

BOTH INTERNATIONAL & INLAND In which situation do the Rules require both vessels to change course?

On the cargo manifest, which term is used to describe the weight of the cargo inside a box?

Your vessel is moored portside to and you are taking over the Deck Watch. Which item has the most impact on the safety ...

Why should all electrical appliances aboard a vessel be grounded and ground fault protected?

The SS AMERICAN MARINER has drafts of: FWD 28'-00", AFT 30'-04". Use the white pages of the Stability Data Reference Bo...

Which is TRUE as the temperature of the air reaches the dew point?

As it approaches, what will a typical warm front bring?

At the time of your 1245 position, which statement is TRUE?

You are on a voyage from Boston, MA to the South Pass, L

A great circle crosses the equator at 141°E. It will also cross the equator at what other longitude?

BOTH INTERNATIONAL & INLAND When two power-driven vessels are meeting head-on and there is a risk of collision, which a...

Periodic surveys to renew the load line assignment must be made at which interval?

Which lashing gear used aboard Ro-Ro vessels should be painted or soaked in oil when not in use?

What does reducing the liquid free surfaces in a vessel reduce?

You have 50 containers of ships stores each measuring 6'L by 4'B by 3'H and weighing 0.4 ton each. Each container is st...

What happens to the intensity of a hurricane as it reaches higher latitudes and cooler waters?

Which agency publishes the Light Lists?

After departing the New Haven terminals, your 1800 position puts the New Haven Harbor Lighted Whistle Buoy "NH" bearing ...

On 11 January your vessel's 0655 zone time DR position is LAT 24°30'N, LONG 122°02'W, when an amplitude of the Sun is ob...

On 3 February your 0547 zone time DR position is LAT 24°18.5'N, LONG 167°25.0'E. Considering their magnitude, azimuth, ...

BOTH INTERNATIONAL & INLAND Vessel "A" is overtaking vessel "B" as shown in illustration D017RR below. Vessel "B" shoul...

When oil is accidentally discharged into the water, what should you do after reporting the discharge?

Which is characteristic of a "special cargo"?

What prevents water running along the shaft of a leaking centrifugal pump from entering the shaft bearing?

You are loading in a port subject to the winter load line mark and bound for a port subject to the tropical load line m...

When navigating in high latitudes and using a chart based on a Lambert conformal projection, which is TRUE?

Which type of precipitation is a product of the violent convection in thunderstorms?

From your 1845 position, you desire to leave Stratford Shoal Middle Ground Light 1.0 mile off your starboard beam at 190...

On 4 October 2023, you will be docking at the Redwood Marine Terminal in Eureka, CA at the first low tide. The berth is ...

You are planning a voyage from LAT 48°30'N, LONG 125°00'W to Korea via LAT 48°30'N, LONG 153°00'E. Which of the followi...

BOTH INTERNATIONAL & INLAND Which is TRUE of a power-driven stand-on vessel?

A vessel puts into the port of Kobe, Japan to discharge cargo. While awaiting completion of the cargo operation, the ve...

A marine chemist issues gas free certificates and is certified by which organization?

Which is the best source of information on the location of the blocks when dry docking a vessel?

The SS AMERICAN MARINER has the liquid load shown in table ST-0098 below. Use the white pages of The Stability Data Ref...

What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star si...

You are on course 042°T. To check the course of your vessel you should observe a celestial body on which bearing?

You desire to make good a true course of 157°. The variation is 15°E, magnetic compass deviation is 9°W, and gyrocompas...

BOTH INTERNATIONAL & INLAND You hear the fog signal of another vessel forward of your beam. Risk of collision may exist...

Your vessel is disabled and in imminent danger of grounding on a lee shore. The Master agrees to salvage services using...

Given a dry bulb temperature of 78°F and wet bulb temperature of 66.5°F, what is the dew point?

A floating vessel will behave as if all of its weight is acting downward through which point?

The SS AMERICAN MARINER is loaded with the cargo shown in table ST-0005 below. Use the white pages of The Stability Dat...

Which type of daymark is used to mark the port side of the channel when entering from sea?

The owner or Master of a towing vessel shall ensure that all tests and inspections of gear take place. When are these a...

On 22 November your vessel is enroute from Accra, Ghana to Montevideo, Uruguay. You are on course 240°T and making a sp...

BOTH INTERNATIONAL & INLAND You are underway in heavy fog. You hear the fog signal of a vessel which is somewhere ahead...

A vessel proceeding to London, England, from New York makes an unscheduled call at the port of Hamilton, Bermuda. What ...

As a general guide, under which condition should hygroscopic cargoes be ventilated?

When is it recommended that the external flotation bladder on an immersion suit be inflated?

Your vessel's drafts are: FWD 14'-04", AFT 15'-02"; and the KG is 23.2 feet. Use the selected stability curves in the b...

An electronic depth finder operates on which principle?

While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships foghorn 2 1/2 seconds after the...

On 28 July your 0800 zone time (ZT) fix gives you a position of LAT 25°16.0'N, LONG 71°19.0'W. Your vessel is on course...

BOTH INTERNATIONAL & INLAND You are underway in restricted visibility. You hear the fog signal of another vessel about ...

What is the difference between net tonnage and gross tonnage?

The wire rope used for cargo handling on board your vessel has a safe working load of eight tons. It shall be able to w...

Which describes the floors aboard a ship?

Use the material in Section 1, the blue pages, of the Stability Data Reference Book. If the KG is 24.2 feet, and the dra...

A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than which duration?

The datum from which the predicted heights of tides are reckoned in the tide tables is the same as that used for the ch...

You observe the lower limb of the Sun at a sextant altitude (hs) of 38°07.5' on 8 August. The index error is 5.2' off t...

BOTH INTERNATIONAL & INLAND Which vessel is the stand-on vessel when two vessels crossing in fog are NOT in sight of on...

What do the York-Antwerp Rules relate to?

Cargo vessels being navigated, and fitted with emergency lighting and power systems, shall have their emergency systems...

The vessel shown in illustration D025DG has broken down and you are going to take her in tow. The wind is coming from h...

Your vessel's drafts are: FWD 23'-01", AFT 24'-05"; and the KG is 22.8 feet. Use the selected stability curves in the bl...

In the Northern Hemisphere, where will the largest waves or swells created by a typhoon or hurricane be located?

On a voyage from Halifax, N.S., to Dakar, West Africa, the Canary Current will __________.

On 14 October your 0800 zone time (ZT) dead reckoning position is LAT 28°22.0'N, LONG 161°17.0'E. Your vessel is on cou...

BOTH INTERNATIONAL & INLAND The steering and sailing rules for vessels in restricted visibility apply to vessels ______...

Which part of a windlass physically engages the chain during hauling or paying out?

You must load as much of a large shipment of case goods as possible into a hold which has 24,400 cubic feet of space. E...

Your vessel is damaged and on an even keel. There is no trim. The freeboard is reduced to less than 1 foot. The rolling...

Which describes the visible range marked on charts for lights?

How can the accuracy of an azimuth circle be checked?

INTERNATIONAL ONLY Which light(s) shall a single vessel being towed alongside show?

SOLAS requires Emergency Instructions be posted in conspicuous places throughout the vessel. On a passenger vessel what...

A disadvantage of using chain lashing on heavy vehicles aboard Ro-Ro vessels is that __________.

While steering by autopilot you notice that the vessel is deviating from the given course and there is no follow up wit...

You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'...

You take a bearing of 264° of a lighthouse. What bearing of another object would give the best fix?

INTERNATIONAL ONLY You have sighted three red lights in a vertical line on another vessel dead ahead at night. Which ve...

Your vessel is broken down and rolling in heavy seas. How can you reduce the danger of capsizing?

In special cases, the Commandant of the Coast Guard may permit cargo piping to pass through machinery spaces, what are ...

Your vessel has grounded on a bar. What should you do?

Brief, violent showers frequently accompanied by thunder and lightning are usually associated with __________.

A great circle will intersect the equator at how many degrees of longitude apart?

BOTH INTERNATIONAL & INLAND In which situation would risk of collision definitely exist?

What will NOT be found on the Certificate of Inspection of an oceangoing tankship?

Ship's officers should check every cargo compartment after it is filled with bulk grain to ensure which of the followin...

The rescuer can best provide an airtight seal during mouth-to-mouth resuscitation by pinching the victim's nostrils and...

Which type of weather could you expect soon after seeing "hook" or "comma" shaped cirrus clouds?

What does the expression "the air is saturated" mean?

BOTH INTERNATIONAL & INLAND You are on Vessel "A" engaged in fishing in a narrow channel as shown in illustration D037R...

You are Master of a U.S. flag vessel which was dry docked for bottom cleaning in Rotterdam, Netherlands. Upon return to...

The tankship Northland is loaded as shown in table BL-0004 below. Use the salmon-colored pages in the Stability Data Re...

You are fighting a class "B" fire with a portable dry chemical extinguisher. How should the discharge be directed?

You take a bearing of 176° of a lighthouse. Which bearing of another object would give the best fix?

What is the term used for the horizontal angle between the magnetic meridian and the north-south line axis line of the ...

BOTH INTERNATIONAL & INLAND When in sight of another vessel and there is sufficient sea room, any action taken to avoid...

Which is the best method to stop a vessel from dragging anchor in a sand bottom?

According to the Chemical Data Guide, what are the flammable limits of ethylene oxide?

Which of the following best defines the term "chock"?

In the North Sea area, you sight a buoy showing a quick white light with 6 flashes, followed by one long flash at 15 se...

What happens to the barometric pressure after a cold front passes?

BOTH INTERNATIONAL & INLAND A traffic separation zone is that part of a traffic separation scheme which __________.

Which document is NOT required by law to be posted aboard a vessel?

In accordance with U.S. regulations which statement is true concerning packages containing Class 1 explosive material?

How does foam extinguish a fire?

On the pole side of the high-pressure belt in each hemisphere, the pressure diminishes. The winds along these gradients...

You are outbound in a channel marked by a range astern. The range line is 309°T. You are steering 127°T and have the ra...

BOTH INTERNATIONAL & INLAND When do the Rules state that risk of collision shall be deemed to exist?

On which form do you provide a written report of Marine Casualty to the nearest Coast Guard Marine Safety Office?

Who issues the certificate of loading required by each vessel carrying grain in bulk?

On the vessel's Fire Control Plan, all parts of a fixed fire suppression system are listed EXCEPT?

Which compensates for induced magnetism in the horizontal soft iron of a vessel?

In some river mouths and estuaries, the incoming high-tide wave crest overtakes the preceding low-tide trough. This res...

INTERNATIONAL ONLY A wing in ground (WIG) craft cannot comply with the spacing requirement for masthead lights. What is...

A seaman dies during a voyage. What is NOT required to be entered into the Official Log?

To determine the weight capacity of a deck in a cargo hold, which reference would you refer to?

Your vessel has just run aground. Which of the following would be one of the first actions you should take in this situ...

Which level of accuracy can be obtained utilizing the U.S. Coast Guard's Maritime Differential GPS in an established co...

On a voyage along the coast of France, you sight a buoy with the top marks as shown in illustration D026NG below. How s...

INLAND ONLY The masthead light may be located at other than the fore and aft centerline on which power- driven vessel?

Your vessel is a single-screw ship with a right-hand propeller. There is no current. Which is the easiest way to make a...

Cargo hose carried on tank vessels must be designed to withstand the pressure of the shutoff head of the cargo pump or ...

How does good housekeeping prevent fires on a vessel?

Which is the difference between the DR position and a fix, both of which have the same time?

The principal vertical circle is that great circle on the celestial sphere that passes through which of the following?

INLAND ONLY Which statement is TRUE concerning lighting requirements for Great Lakes vessels?

What is the name of the mark indicated by the letter E in illustration D003DG below?

Before loading bulk grain, why should the bilge wells be covered with burlap?

When evacuating a seaman by helicopter lift, which course should the ship take?

In illustration D051NG below, why was the position labeled "E" plotted?

What does a wind vane on a moving vessel show?

INLAND ONLY A power-driven vessel when pushing ahead or towing alongside on the Western Rivers (above the Huey P. Long ...

Which is the BEST way to reduce your wake in a narrow channel?

Which action(s) is/are included in crane operations?

When discharging a portable CO2 fire extinguisher, why must you grasp the hose handle and NOT the discharge horn?

Which is the reference datum used in determining the heights of land features on most charts?

The new Moon cannot be seen because the Moon is __________.

INLAND ONLY Vessels "A" and "B" are meeting on a river as shown in illustration D041RR below and will pass 1/4 mile apa...

What is the minimum number of bolts required in a permanently connected flange oil hose coupling?

Under the Carriage of Goods by Sea Act of 1936, a vessel will be liable for damage to cargo when the damage arises out ...

The distress message of a ship should include considerable information which might facilitate the rescue. Which is TRUE...

Which general weather conditions should you expect to find in a low-pressure system?

The error in a sextant altitude caused by refraction is greatest when the celestial body is in which location?

INLAND ONLY A barge more than 50 meters long is required to show how many white anchor lights when anchored in a Secret...

How long must a "Declaration of Inspection" be kept on board?

When using the Code of Federal Regulations (CFR's) for Tank Vessels, you see T/O and B/C. What do the T and B tell you?

Which is TRUE of the term negative slip on a vessel?

What is the standard atmospheric pressure in millibars?

You are on course 357°T and take a relative bearing of a lighthouse of 180°. What is the true bearing to the lighthouse...

BOTH INTERNATIONAL & INLAND You see ONLY the light shown in illustration D080RR below. Which type of vessel are you obs...

Which document will describe lifesaving equipment located aboard your vessel?

Ten triangular piles of piping on the pier are to be loaded - each pile has a 20 foot base, is 15 feet high and 30 feet...

A fire in electrical equipment should be extinguished by using which type of extinguishing agent?

When utilizing a Pacific Coast chart, which is the reference plane of soundings?

In which months will the North Equatorial Countercurrent be strongest?

BOTH INTERNATIONAL & INLAND A vessel displaying the shape shown in illustration D010RR below is which of the following?

You are arriving in port and are assigned to anchor in anchorage circle B-4. It has a diameter of 500 yards and your ve...

The load chart of a crane enables the operator to combine the load radius with boom length to determine the __________.

A well in the uppermost deck of a shelter deck vessel which has only a temporary means of closing for the purpose of ga...

Which type of precipitation occurs only in thunderstorms with strong convection currents that convey raindrops above an...

By what means are indications of the master gyrocompass sent to remote repeaters?

BOTH INTERNATIONAL & INLAND Which of the following describes a vessel exhibiting the lights shown in illustration D084R...

Under U.S. law, what is the penalty for assaulting the Master?

When bunkering is complete, which is the correct procedure concerning the bunker hoses?

Which statement is TRUE concerning a motor lifeboat?

You are on course 344°T and take a relative bearing of a lighthouse of 090°. What is the true bearing to the lighthouse...

On a nautical chart, what does the inner ring of a compass rose indicate?

BOTH INTERNATIONAL & INLAND The stern light shall be positioned such that it will show from dead astern to how many deg...

When running before a heavy sea, what will moving weights aft on the vessel accomplish?

A case received for shipment has the markings shown in illustration D043DG below. Each carton measures 13" X 15" X 23"....

A vessel's bottom will be subjected to tension when weight is concentrated in which location(s)?

The velocity of the wind, its steady direction, and the amount of time it has blown determines what about a wind driven...

What is the standard atmospheric pressure as measured in inches of mercury?

BOTH INTERNATIONAL & INLAND Which is TRUE of a tugboat displaying the shape shown in illustration D010RR below?

Your ship is in shallow water and the bow rides up on its bow wave while the stern sinks into a depression of its trans...

How should a look-out, in the merchant service, report sightings?

Which term describes the geometric center of the underwater volume of a vessel?

Which is the region containing 3/4 of the mass of the atmosphere and to which are confined such phenomena as clouds, st...

Under the U.S. Aids to Navigation System, which category is a yellow buoy?

INLAND ONLY What signal is a power-driven vessel, when leaving a dock or berth, required to sound?

A Temporary Certificate of Inspection is effective until which time period?

Regulations require that prior to departure on a three-day voyage, the steering gear, whistle, and communications syste...

You are the person in charge of a lifeboat when land is sighted. Due to a medical emergency, you have made the decision...

Entering a harbor, you take a bearing on a range and get 338° per gyrocompass (pgc). The true bearing from the chart is...

Distance along a track line is measured on a Mercator chart by using which method?

INLAND ONLY You are underway in a narrow channel, and are being overtaken by another power-driven vessel. The overtakin...

What is the period of validity of a Safety Management Certificate?

Because of the arrangement of the cell guides, which is the MOST important factor while loading containers?

Where there are multiple accident victims, which type of injury should be the first to receive emergency treatment?

You are underway on course 160°T while turning for an engine speed of 10 knots. The current is 210°T at 0.9 knots. What...

What is the equivalent of 10 min. 52 sec. in arc units?

INTERNATIONAL ONLY A vessel sounds two short blasts. What does this indicate?

Small floes of rough, hummocky sea ice are capable of damaging a vessel. Which statement is TRUE?

What color must the last 1.0 meter (3.3 feet) of piping before the vessel vapor connection be painted?

The atmosphere in a tank is too rich when it is __________.

You will find daily information about the duration of slack water in a port on the Atlantic Coast in which publication?

You are plotting a running fix. The LOP to be run forward is an arc from a radar range, what technique should be used?

INTERNATIONAL ONLY Two power-driven vessels are meeting. What would a two-blast whistle signal by either vessel mean?

Which international body is responsible for drafting the MARPOL convention prohibiting marine pollution?

If you carry packaged hazardous cargoes on a break bulk vessel bound foreign, you must __________.

If you have to jump in the water when abandoning ship, your legs should be in which position?

In the North Sea area, you sight a buoy showing an uninterrupted quick-flashing white light. Which of the four topmarks...

You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse...

BOTH INTERNATIONAL & INLAND Which is the duration of each prolonged blast on whistle signals used by a power-driven ves...

An icebreaker assisting a vessel through an ice field would display a visual signal consisting of the code letter "E" (...

How should you signal the crane operator to use the main hoist?

Which is TRUE of a distress signal?

You are inbound in a channel marked by a range. The range line is 216°T. You are steering 213°T and have the range in s...

What must the owner or Master do if any of the towing vessel's required navigational safety equipment fails during a vo...

BOTH INTERNATIONAL & INLAND What is the duration of each blast of the whistle signals used in head-on and/or crossing s...

U.S. regulations require all tankships of 150 GT and above and all other ships of 400 GT and above, to prepare and main...

What is meant by the term "topping the boom"?

You are involved in an emergency landing of a helicopter on the water. When should you inflate your life jacket?

Which term is given to the mechanical lifting of air by the upslope slant of the terrain?

You have been informed that dredging operations may be underway in your vicinity. Which buoy indicates the dredging are...

BOTH INTERNATIONAL & INLAND Which of the signals, other than a distress signal, can be used by a vessel to attract atte...

When taking a Pilot from a pilot vessel in a seaway, which way should you head your vessel if the ladder is on the leew...

You are in a tropical port. The refrigeration machinery on a container loaded with air-cooled fruit fails. It cannot be...

Blocks and falls used as lifeboat gear must be designed with which minimum safety factor?

Which indication on the barometer is most meaningful in forecasting weather?

Which is TRUE of the dangerous semicircle of a hurricane in the Northern Hemisphere?

BOTH INTERNATIONAL & INLAND What is the minimum sound signaling equipment required aboard a vessel 10 meters in length?

How does the effect known as "bank suction" act on a single-screw vessel proceeding along a narrow channel?

Your vessel is loaded with nonhygroscopic cargoes and is going from a cold to a warm climate. Which action should you t...

What is a wobbling tail shaft an indication of?

How long would a steady wind need to blow in order to create a wind driven current?

Yesterday you took a time tick using the 1200 GMT broadcast, and the chronometer read 11h 59m 59s. Today at the 1200 GM...

BOTH INTERNATIONAL & INLAND Which statement is TRUE regarding equipment for sound signals?

Which statement is TRUE of a gasoline spill?

The most likely time for oil pollution while bunkering is when __________.

Inflatable liferafts shall be serviced at an approved servicing facility every 12 months or not later than the next ves...

Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 58s at the 1...

While on a course of 349°T, a light bears 13° on your starboard bow at a distance of 10.8 miles. What course should you...

BOTH INTERNATIONAL & INLAND Two power-driven vessels are crossing as shown in illustration D042RR below. Vessel "A" sou...

Which document lists all the lifesaving equipment required for a vessel?

A high cube container is designed specifically to accomplish which task?

When a vessel is stationary and in a hogging condition, the main deck is under which type of stress?

Which defines the term relative humidity?

What is TRUE concerning new editions of Light Lists?

BOTH INTERNATIONAL & INLAND A vessel nearing a bend where other vessels may be obscured is required to sound which sign...

Which action has a tendency to happen to a vessel proceeding along the bank of a river or channel with steep banks?

Before welding is permitted on a fuel tank, it must be certified or declared as which of the following?

What is the purpose of the inclining experiment?

The Brazil Current flows in which general direction?

What does a barometer showing falling pressure indicate?

BOTH INTERNATIONAL & INLAND Which vessel(s) is/are required to sound a fog signal of one prolonged followed by two short...

As the propeller turns, voids are formed on the trailing and leading edges of the propeller blades causing a loss of pr...

You are loading 465,000 barrels of cargo oil. At 0900 you find that you have loaded 207,000 barrels. At 1030 you find th...

Which term is given to the maximum length allowed between main, transverse bulkheads on a vessel?

At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position, and it is 0.5 mile eas...

You are steering 154°pgc. The wind is southwest causing 4° leeway. The gyro error is 3°E, variation is 11°W and deviati...

BOTH INTERNATIONAL & INLAND What is the required fog signal for a manned vessel being towed at night?

What speed do most bow thrusters generally become ineffective?

What is acceptable flame screening?

On the fire control plans, in illustration D039SA below, the CO2 bottle room is designated by which symbol?

What daymark has NO lateral significance?

The path that a vessel is expected to follow, represented on a chart by a line drawn from the point of departure to the...

BOTH INTERNATIONAL & INLAND A vessel engaged in fishing while at anchor shall sound which fog signal?

When passing a moored vessel in a narrow channel which actions will help minimize wake damage?

When is a lookout permitted to leave his station?

What is the purpose of rigging frapping lines on lifeboat falls?

Lines drawn through points on the Earth having the same atmospheric pressure are known by which term?

Which correction(s) must be applied to an aneroid barometer?

BOTH INTERNATIONAL & INLAND You hear the firing of a gun at one-minute intervals from another vessel. What does this sig...

The forecastle card is a copy of which document?

Which of the following statements is/are TRUE in regard to Ro-Ro vessels' spaces that are "specially suitable for vehicl...

When a rescue vessel approaches a survival craft in heavy seas, which action should the person in charge of the surviva...

What is the color scheme of navigational marks used for informational or regulatory purposes?

You are on course 303°T. To check the speed of your vessel you should observe a celestial body on which bearing?

BOTH INTERNATIONAL & INLAND What does the continuous sounding of a fog whistle by a vessel indicate?

While heaving in the anchor prior to entering the wildcat you observe four white links on each side of a red link. What ...

An annual inspection of a tank vessel shall be made between which of the following months while the Certificate of Inspe...

How would the exhaust of a properly operating diesel engine appear?

Which action is the safest and most prudent procedure to follow while navigating in the vicinity of a tropical cyclone?

What is a sling psychrometer used to measure?

In illustration D033DG below, what is the joint indicated by letter D?

Which statement is TRUE concerning equatorial tides?

At about GMT 1436, on 3 December, the lower limb of the Moon is observed with a sextant having an index error of 2.5' o...

What is the objective of shoring a damaged bulkhead?

Which describes the level of database information which cannot be removed from the ECDIS display and consists of inform...

What is NOT an advantage of the rhumb line track over a great circle track?

On the all-purpose nozzle, what is the position of the nozzle valve when the handle is all the way forward?

To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at which time...

A sidereal day is shorter than a solar day. What is the reason for this difference?

The center of volume of the immersed portion of the hull is given which term?

All of the following can be found on a Pilot Chart EXCEPT information concerning which item?

How does the standard magnetic compass heading differ from the true heading?

What is the difference between the starboard and port drafts due to the wind or seas called?

The owner or Master of a towing vessel that is operating within a Vessel Traffic Service (VTS) area must report specifi...

Your ARPA has two guard zones. What is the purpose of the inner guard zone?

In illustration D039SA below, which fire control plan symbol(s) represents the agent or device best suited for extingui...

Your vessel is on course 150°T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. Wh...

Which weather element cannot be measured accurately while on board a moving vessel?

A vessel having continuous closely spaced transverse strength members is __________.

When the moon is new or full, which type of tides occur?

At 0000 you fix your position and change course to 090°T. At 0030 you again fix your position, and it is 0.5 mile east ...

All personnel on board a vessel should be familiar with the rescue boat's __________.

The owner or Master of a towing vessel shall ensure that each person that directs and controls the movement of the vess...

If several navigational lights are visible at the same time, each one may be positively identified by checking all of t...

A situation has occurred where it becomes necessary for you to be towed. What action should be taken to prevent your ve...

A safe water daymark has what shape?

Which statement about a gnomonic chart is correct?

Heave is motion along which axis?

Ascending and descending air masses with different temperatures is part of an important heat transmitting process in ou...

Which item in illustration D034NG below shows a fixed and flashing light?

Which action should you take after sending a false distress alert on VHF?

When adjusting a magnetic compass for error, which is TRUE concerning the deviation table?

Chart information details to be used in ECDIS should be the latest edition of information originated by a government-au...

How does bleeding from a vein appear?

When trying to sight a lighthouse you notice a glare from a town in the background. How does this affect the range at w...

Which clouds are described as uniform, grayish-white cloud sheets that cover large portions of the sky, and are respons...

When water is used to fight a fire on board a ship, the effect of the weight of the water must be taken into account. H...

While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 4 1/2 seconds after t...

Under the IALA-A Buoyage System, a buoy indicating the preferred channel is to port would have __________.

What is the spoken emergency signal for a distress signal over a VHF radio?

When within 300 miles of a named tropical storm or hurricane, it is standard practice to send weather reports at which ...

When compared to air temperature, which factor is most useful in predicting fog?

When the height of the metacenter is greater than the height of the center of gravity, the upright equilibrium position...

You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°E. The vari...

Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact ...

When flammable liquids are handled in a compartment on a vessel, which is TRUE concerning the ventilation for that area...

Radar makes the most accurate determination of the __________.

You are steaming in the open ocean of the North Pacific between the Aleutian Chain and Hawaii. A warning broadcast indi...

Which statement concerning the sources of drinking water is FALSE?

A latitude line will be obtained by observing a body __________.

You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°W. The varia...

What term indicates the immersed body of the vessel aft of the parallel mid-body?

You are steaming on a course of 246°T at 17 knots. At 2107 you observe a lighthouse bearing 207°T. At 2119 the lighthous...

Which type of daymark is used to mark the port side of the channel when entering from sea?

When evacuating a seaman by helicopter lift, the vessel should be which of the following?

As a warm front approaches how does barometric pressure change?

ECDIS units incorporate Digital Chart Data that utilizes which formats?

How should latitude 54°18.9'N be written when preparing an AMVER report?

If the current and wind are in opposite directions, what does the sea surface indicate?

When does the effects of priming of the tides occur?