ONC04 - Mate of LT 500-1600 GRT

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

Which of the following is classified as a flammable liquid?

Where a propeller shaft passes through the hull, which device prevents water from entering the hull?

Which is TRUE for the directive force acting on a gyrocompass?

Which term is given to the angle that is measured westward from the first point of Aries to the hour circle of the body...

The following questions should be answered using Chart 12354TR, Long Island Sound - Eastern Part, and the supporting pu...

On 1 September your 1115 zone time DR position is LAT 25°20.0'N, LONG 28°24.0'W. At that time, you observe the Sun be...

On 14 March your 1846 ZT DR position is LAT 21°57.6' N, LONG 132°16.2' W. At that time, you observe Polaris with a sext...

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

You are transporting dangerous cargo on your vessel. Who is required to sign the Dangerous Cargo Manifest acknowledging...

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

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

Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?

You depart from the position in the previous question at 2114 and make good 12 knots on a course of 040°T. At what time...

On 31 October your 1700 zone time DR position is LAT 27°17.0'N, LONG 116°10.0'W, when an amplitude of the Sun is observ...

On 6 December your 0800 zone time DR position was LAT 21°48.0'N, LONG 124°30.0'E. Your vessel was steaming on course 04...

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

What is the period of validity of a Merchant Mariner Credential?

In illustration D039SA below, which Fire Control Plan symbol represents the best means to extinguish a LARGE Class Brav...

Which position includes the effects of wind and current?

Your radar displays your ship off center. As you proceed on your course, your ship's marker moves on the PPI scope whil...

At 2142, you take the following bearings: Stratford Point Light 331°T Stratford Shoal Middle Ground Light 280°T Old F...

You are turning 90 RPM, with a propeller pitch of 24 feet, and an estimated slip of -3%. What is the speed of advance?

You observe the lower limb of the Sun at a sextant altitude (hs) of 41°29.8' on 11 January. The index error is 2.4' off...

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

You are conducting trials to determine the maneuvering characteristics of your vessel. While making a turn, you take ra...

What is the name given to the distance between the waterline of a vessel and the main continuous deck of a vessel?

Which term is used to describe the time interval between successive wave crests?

ECDIS must give an alarm for which of the following cases?

What was the speed made good between 2114 and 2142?

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

At 1730 zone time, on 3 March, your DR position is LAT 16°00'S, LONG 80°00'W. You are steering 000°T at a speed of 7.5 ...

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

Carbon dioxide cylinders which protect machinery spaces, paint lockers and tanks may be located within those spaces whe...

Which causes spontaneous combustion?

What is the characteristic of a quick flashing light?

The compass rose on a nautical chart indicates both variation and which other information?

At 2142, you change course to make good 030°T and increase speed to 14 knots. You rendezvous with another vessel and re...

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

On 1 October you determine the zone time of evening twilight will be 1835. Your DR position will be LAT 27°18.0'N, LONG...

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

When an Official logbook is not required, an unofficial logbook is required to be kept aboard for review by a marine in...

You are in a lifeboat broadcasting a distress message. What information would be essential to your rescuers?

Where are buoys and day beacons exhibiting a yellow triangle or square painted on them used?

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

At 0109 you get underway, and at 0112 you take the following bearings: Branford Reef Light bearing 051° true Stratford ...

On 10 November 2023 at 0630, you are inbound at Charleston Harbor Entrance Buoy “10” (ACT6611). Your vessel will transi...

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...

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

Which is the nomenclature for the metal plates that cover the top of the hawsepipe on a vessel?

Distress signals may be __________.

Which is TRUE of echo-sounders?

Aneroid barometers are usually calibrated to indicate atmospheric pressure in which units?

At 0112, what is the approximate depth under the keel?

You are turning 93 RPM, with a propeller pitch of 25 feet, and an estimated slip of 0%. What is the speed of advance?

The true course between two points is 119°. Your gyrocompass has an error of 3°E. You allow of 4° leeway for a south-so...

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

A flame screen __________.

The two factors which make underwater hull repair difficult are accessibility and which other factor?

In the Northern hemisphere which semicircle of a hurricane is the navigable semicircle?

Considering the general circulation of the atmosphere, what is the name given to the wind system between latitudes 30°N...

At 0112, you are on course 124°T and turning for 12.0 knots. What course will you make good if the current is 255°T at ...

You are taking a time tick using the 1930 signal from Rio de Janeiro, Brazil. You hear the preparatory signal "CQ DE PP...

On 22 February your 1857 DR position is LAT 23°46.0'S, LONG 93°16.5'E. You observe an unidentified star bearing 126°T a...

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

On your vessel, a wire rope for the cargo gear shows signs of excessive wear and must be replaced. In ordering a new wi...

What power source actuates a solenoid valve?

What does a Doppler log in the bottom return mode indicate?

You are in a buoyed channel at night and pass a lighted buoy with an irregular characteristic. Who should you report th...

Branford Reef is __________.

A vessel steams 3312 miles on course 282°T from LAT 34°24'S, LONG 18°18'E. What is the latitude and longitude of the poi...

On 25 March your 0500 ZT DR position is LAT 28°14.0'S, LONG 93°17.0'E. You are on course 291°T at a speed of 16.0 knots...

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

On a ship's crane, the load chart relates the allowable load to the combination of the boom length and __________.

When using the rain water collection tubes on a liferaft, what should be done with the first collection?

The apparent wind is zero when which situation exists with the true wind?

What is characteristic of an isophase light?

At 0112, the radar range to Branford Reef Light is 2.9 miles. At 0125, the range is 3.6 miles. What is the position of ...

On 15 October 2023, you will be docking on the Southern Branch Elizabeth River, VA at the second high tide. The berth is...

The great circle distance from LAT 38°17'N, LONG 123°16'W to LAT 35°01'N, LONG 142°21'E is 4330 miles, and the initial ...

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

Which safety check(s) should be made before letting go the anchor?

When abandoning ship and jumping into the water from a substantial height without a life jacket, you should __________.

What is the draft?

What does a barometer showing falling pressure indicate?

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

At 0130, your position is LAT 41°09.3'N, LONG 72°46.9'W when you change course to 086°T. If you make good 086°T, what i...

On 7 November your 0830 zone time fix gives you a position of LAT 27°36.0'N, LONG 163°19.0'W. Your vessel is on course ...

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

Which statement is TRUE when loading a tanker?

Which term is used to describe the horizontal port or starboard movement of a vessel?

The hurricane season in the North Atlantic Ocean reaches its peak during which month?

While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's foghorn 3 seconds after the si...

At 0200, you take the following bearings: Falkner Island Light 004.5°T Kelsey Pt. Breakwater Lt. 054.0°T Horton Point...

Your vessel is on a course of 358°T at 19 knots. At 0316 a light bears 024.5°T, and at 0334 the light bears 043°T. ...

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

Which is the proper procedure when taking a length of new manila rope from the coil?

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

How are chart legends which indicate a conspicuous landmark printed?

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

What is the distance from your 0200 position to the point where Twenty-Eight Foot Shoal lighted buoy is abeam to starbo...

A vessel steams 580 miles on course 083°T from LAT 13°12'N, LONG 71°12'W. What are the latitude and longitude of the po...

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

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

A motor lifeboat shall carry sufficient fuel to operate continuously for a period of which duration?

You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red l...

The shoreline shown on nautical charts of areas affected by large tidal fluctuations is usually the line of mean ______...

The shoreline along Rocky Point should give a good radar return because __________.

Your vessel receives a distress call from a vessel reporting her position as LAT 35°01.0'S, LONG 18°51.0'W. Your positi...

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

Every entry required to be made in the Official Logbook shall be signed. Who is required to sign this logbook?

Which is an advantage of an ABC dry chemical over a carbon dioxide extinguisher?

Which defines the term relative humidity?

Which is one of the advantages of a vessel utilizing a NAVTEX unit to receive MSI?

You sight Bartlett Reef Light in line with New London Harbor Light bearing 043°pgc. You are heading 088°pgc and 098.5° ...

On 7 December your 0350 ZT position is LAT 35°42'N, LONG 17°38'E. You observe Polaris bearing 359.7°pgc. At the time of...

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

What is/are the advantage(s) of cranes over conventional cargo booms?

While underway in thick fog you are on watch and hear the cry "man overboard". Which type of maneuver should you make?

Which name is given to the pressure-sensitive element of an aneroid barometer?

Which wind results from a land mass cooling more quickly at night than an adjacent water area?

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

A vessel to which Annex V to MARPOL 73/78 applies is located 10 nautical miles from the nearest land. Which type of gar...

The SS AMERICAN MARINER has drafts of: FWD 16'-10", AFT 19'-04". Use the white pages of the Stability Data Reference Bo...

You take a bearing of 356° of a lighthouse. What bearing of another object would give the best fix?

To find the specific phase characteristic of a lighthouse on a sound of the United States you would use which reference...

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

If you are operating on the Inland Waters of the United States, which of the following may you discharge overboard?

The Master of a cargo or tank vessel shall be responsible that each lifeboat, except those free-fall launched, is lower...

Fog is formed when which condition exists?

While on a course of 066°pgc, a light bears 13° on the port bow at a distance of 12.3 miles. What course should you ste...

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

Which agency must approve the safety equipment on board inspected vessels?

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

Under the IALA-B Buoyage System, when entering from seaward which lateral system buoy as shown in illustration D046NG b...

A chart position enclosed by a square is a(n) __________.

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

You are conducting trials to determine the maneuvering characteristics of your vessel. While making a turn, you take ra...

What is the meaning of the signal VJ 8 when sent by the International Code of Signals?

What is published by the U.S. Coast Guard?

Yesterday your chronometer read 02h 59m 58s at the 1500 GMT time tick. Today the chronometer reads 03h 00m 02s at the 1...

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

When anchoring, good practice requires 5 to 7 fathoms of chain for each fathom of depth. Which is TRUE when anchoring i...

Oily rags stored in a pile that is open to the atmosphere are a hazard because they may __________.

You sight a buoy fitted with a double-sphere topmark. If sighted at night, what color and light sequence would you expe...

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

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

You are underway in heavy weather and your bow is into the seas. Which action should you take to prevent pounding?

The operating cord on an inflatable liferaft should be renewed by __________.

Your vessel is proceeding up a channel steering on a pair of range lights that are in line ahead. The chart indicates t...

Which cardinal quadrant is represented by the topmark in illustration D024NG below?

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

There is a large shipment of case goods available to be loaded on your vessel. You are to load as many tons as possible...

Which is the normal tendency for a loaded tanker?

While on a course of 019°pgc, a light bears 14° on the port bow at a distance of 15.3 miles. What course should you ste...

Which is TRUE concern the horizon glass of a sextant?

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

What is the Vapor pressure of ethylene oxide at 46°C?

CATEGORY I EPIRB's transmit on frequencies that are monitored by __________.

Which statement(s) is/are TRUE concerning radio equipment on towing vessels of 26 feet or more in length?

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

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

Which statement about entering into a tank which has been sealed for a long time is TRUE?

A fire starts in a switchboard due to a short circuit. This is which class of fire?

Which of the symbols shown in illustration D018NG below represents a warm front?

You are steaming in a westerly direction along the Gulf Coast. You see ahead of you a lighted buoy showing a red isopha...

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

While on watch at sea you must maintain a proper lookout at all times. On a 700-foot cargo vessel being hand-steered du...

When hoisting a boat on gravity type davits using an electric motor driven winch, the davit arms should be brought up t...

Your vessel is on course 180°T speed 22 knots. The apparent wind is from 70° off the port bow, speed 20 knots. What are...

On November 1st the zone time is 1700 EST (ZD +5) in LONG 75°W. What is the corresponding zone time and date in LONG 13...

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

Deck foam systems, designed to protect cargo areas on tank vessels built after January 1, 1975, must have a supply of f...

The all-purpose nozzle will produce a fog spray when you take which action?

Which list of clouds is in sequence, from highest to lowest in the sky?

The magnitude of three stars is indicated. Which star is the brightest?

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

Which is a precaution you should take before bunkering?

You hear on the radiotelephone the word "Securite" spoken three times. What does this indicate?

On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. Which is TRUE...

If you are the Master of a towing vessel who’s only working radar no longer functions, what must you do?

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

A tank vessel transferring non-flammable hazardous cargo in bulk must display warning signs. These signs must _________...

Stable equilibrium for a vessel means that the metacenter is at which location?

When does a current perpendicular to a vessel's track have the greatest effect on the vessel's course made good?

Information about currents around Pacific Coast ports of the U.S. can be obtained in which publication?

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

Your tank barge requires repairs that include welding. Who normally would issue a gas-free certificate?

Which extinguishing agent is most effective on a mattress fire?

You are in a buoyed channel at night and pass a lighted buoy with an irregular characteristic. Who should you report th...

Which is TRUE for the directive force acting on a gyrocompass?

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

What can be done to prevent small oil spills on deck from going overboard?

You are fighting a fire in a cargo hold on your vessel. Which action is most important concerning the stability of the ...

Which term is given to a radar display which is oriented, so that north is always at the top of the screen?

Your vessel is on course 180°T speed 22 knots. The apparent wind is from 70° off the port bow, speed 20 knots. What are...

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

You have determined the maneuvering characteristics of your vessel by taking the radar ranges and bearings of an isolat...

If your vessel has a GM of one foot and a breadth of 50 feet, what is your vessel's estimated rolling period?

Which is TRUE concerning Hot air?

To avoid error, how should you read the scale of an aneroid barometer?

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

When may vessels to which Annex V to MARPOL 73/78 applies discharge garbage containing plastics into the sea?

How should the number "1" be pronounced when spoken on the radiotelephone?

What causes variation in a compass?

ECDIS units incorporate Digital Chart Data that utilizes which formats?

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

Which term defines the process of dividing the total volume of the ship in cubic feet (after omission of exempted space...

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

While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships foghorn 5.5 seconds after the s...

You should plot your dead reckoning position __________.

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

A vessel that has which of the following will ensure that it will keep its draft at or below the load line mark?

Which type of EPIRB must each ocean-going ship carry?

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

Which is TRUE of a preferred-channel buoy?

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

Which of the signals listed is required to be displayed during the day while bunkering?

Which is TRUE concerning the production of mechanical foam by a portable in-line foam proportioner?

The world is divided into NAVAREAS for the dissemination of important marine information. Which NAVAREAS include the U....

In North America, which direction do the majority of the weather systems move?

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

The last 1.0 meter (3.3 feet) of vapor piping before the vessel vapor connection must be painted __________.

Which is TRUE if passengers are on board when an abandon ship drill is carried out?

You are radar scanning for a buoy fitted with a racon. In illustration D017NG below, which radar screen represents the ...

Advection fog is most commonly caused by __________.

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

In a following sea, a wave has overtaken your vessel and thrown the stern to starboard. To continue along your original...

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

Which defines a light's luminous range?

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...

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

Which agency both assigns load lines, and issues Load Line Certificates?

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

To measure distance on a Mercator chart between the parallels of LAT 34°30'N and LAT 31°30'N, which 30- mile scale shoul...

Isobars on a weather map are useful in predicting which element of the weather?

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

According to Coast Guard Regulations (46 CFR), when loading, or discharging oil in bulk at a dock, which of the followi...

You are in a survival craft broadcasting a distress message. What information would be essential to your rescuers?

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

Entering from seaward, what do triangular-shaped daymarks mark?

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

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

Your vessel is listing because of a negative GM. To lower G below M, which action should you take?

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

Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustr...

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

A flammable liquid having a Reid vapor pressure of 8½ P.S.I.

What wind reverses directions seasonally?

Which condition(s) is(are) necessary for the formation of dew?

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

To determine the number of able seamen required on an inspected vessel, you should check which document?

Which satellite system promulgated Maritime Safety Information?

The needle of an aneroid barometer points to 30.05 on the dial. What does this indicate?

What does the Flinders bar on a magnetic compass compensate for?

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

When the period of beam seas equals the natural rolling period of a vessel, what will most likely occur?

A vessel with a large GM will __________.

You are underway on course 120°T and your maximum speed is 12 knots. The eye of a hurricane bears 150°T, 120 miles from...

Which is the standard meridian for the time zone +1?

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

When oily ballast has been pumped overboard, an entry must be made in which log?

You have just abandoned ship and boarded a raft. After the raft is completely inflated you hear a whistling noise comin...

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

Which time meridian is used when computing the velocity of the current for Pensacola Bay, Florida?

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

Which of the following is the strongest of the natural fibers?

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

What is NOT a characteristic of cardinal marks?

Which of the following is the most accurate method of determining gyrocompass error while underway?

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

Which statement defines the term "gross tonnage"?

A fire of escaping liquefied flammable gas is best extinguished by which action?

The Light List indicates that a light has a nominal range of 18 miles and is 38 feet high. If the visibility is 6 miles...

A navigator fixing a vessel's position by radar __________.

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

How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?

AMVER is a system which as its main goal is to provide which information?

You are in a channel inbound from sea. A daymark used to mark a channel junction when the preferred channel is to starb...

According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, where is the ...

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

Which action should be taken prior to assuming the Deck Watch while the vessel is in port?

Which term describes the horizontal fore or aft motion of a vessel?

What causes compass deviation?

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

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

Unless extremely flexible wire rope is used, the sheave diameter should always be as large as possible. Which is the Co...

The SS AMERICAN MARINER is ready to bunker with drafts of FWD 21'-04", AFT 26'-04". After all bunkers are on board, sou...

A vessel's position should be plotted using bearings of __________.

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

What is the mechanical advantage of tackle number 6 as shown in illustration D029DG below?

Which of the following describes the inspection and testing requirements of a SART?

To avoid error, how should you read the scale of an aneroid barometer?

At evening stars, the first stars that should be observed are those with an azimuth in what quadrant?

A U.S. Coast Guard icebreaker, while escorting ships in ice, has sounded four short and one long blasts on the whistle....

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

Which item in illustration D034NG below shows an occulting light?

What is a common unit of measure for atmospheric pressure?

In handling break bulk hazardous materials, it is forbidden to use __________.

Your vessel displaces 564 tons. The existing deck cargo has a center of gravity of 1.5 feet above the deck and weighs 4...

The vertical distance from the tidal datum to the level of the water is the __________.

Where would you expect to find channels marked with the IALA-A Buoyage System?

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

What is the radiotelephone urgency signal?

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

Which radar control reduces weak echoes out to a limited distance from the ship?

If you observe any situation which presents a safety or pollution hazard during fuel transfer operations, what action s...

A situation has occurred in which your vessel must be towed. When the towing vessel passes the towing line to you, wher...

What type of clouds are associated with a cold front?

The dew point is reached when which condition occurs?

Close link chain of not less the 3/4" (or the wire rope equivalent) is required for lashing deck cargoes of timber. Wha...

You are at sea in an inflatable liferaft. In high latitudes, which presents the greatest danger?

What is the reaction of a gyrocompass to an applied force known as?

When cold air displaces warm air you have which type of front?

As a ship moves through the water, it causes a wake, which is also moving forward relative to the sea. In addition to a...

Your vessel has been damaged and is partially flooded. The first step to be taken in attempting to save the vessel is t...

On an isomagnetic chart, which term is used for the line of zero variation?

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

What is the FIRST action to take if you detect oil around your tank vessel while discharging petroleum products?

Which categories of NAVTEX messages may not be selectively rejected through receiver programming?

When do Spring tides occur?

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

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

What is the MOST important consideration when determining how to fight an electrical fire?

Which of the following is associated with consistently high barometric pressure?

What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?

How many months after its expiration date may a Coast Guard credential be renewed without retaking the complete exam?

You are at sea and have received a General Emergency message announcing the outbreak of war in Europe. You are directed...

Your ship is proceeding on course 320°T at a speed of 25 knots. The apparent wind is from 30° off the starboard bow, sp...

Under the IALA Buoyage Systems, which is TRUE of safe water marks?

Which ending is NOT acceptable in a wire rope that is free to rotate when hoisting?

The most detrimental effect on initial stability is a result of liquids __________.

According to Buys Ballot's Law, when an observer in the Southern Hemisphere experiences a northwest wind, where is the ...

What is NOT a characteristic of cardinal marks?

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

In ship construction, which is TRUE concerning frame spacing?

The shoreline shown on nautical charts of areas affected by large tidal fluctuations is usually the line of mean ______...

The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true _______...

Your vessel is being assisted through an ice field in Thunder Bay by the Canadian Coast Guard icebreaker Alexander Henr...

If the situation arose where it became necessary to tow a disabled vessel, which statement is TRUE concerning the towin...

When making landfall at night, how can you determine if a light is a major light or an offshore buoy?

What does the numeral in the center of a wind rose circle on a pilot chart indicate?

Coast Guard Regulations permit which of the following systems to be used for fire prevention and the simultaneous inert...

Which color of rockets, shells, or rocket parachute flares are used to indicate that the vessel is in distress and requ...

Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustr...

Which form of cloud, that is often known as "mackerel sky", is generally associated with fair weather?

Which is TRUE concerning the vapor pressure of a substance?

A self-righting survival craft will return to an upright position provided that all personnel __________.

Your vessel is leaving New York harbor in dense fog. As the vessel slowly proceeds toward sea, you sight a green can bu...

The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of yo...

Your vessel is taking on fuel when a small leak develops in the hose. You order the pumping stopped. Before you resume p...

The water in which a vessel floats provides vertical upward support. Which term is regarded as the point through which ...

Which is TRUE of mean high water?

The largest waves (heaviest chop) will usually develop where the wind blows __________.

You are a watchstanding mate and have come to the bridge to relieve the watch while underway at sea. Which event(s) will...

Which item is of the most use in getting a lifeboat away from a moving ship?

What is the standard atmospheric pressure in millibars?

Which publication requires infrequent corrections?

Which spaces are required to be segregated from cargo tanks carrying grades A, B, C, or D cargoes?

The gross weight of a fully charged CO2 cylinder is 80 lbs. When the bottle is empty it weighs 60 lbs. What is the minim...

What is indicated when slanted letters are used to spell the name of a charted object?

Which defines a wave's fetch?

Which is the correct procedure for anchoring a small to medium size vessel in deep water?

You are fighting a fire in the electrical switchboard in the engine room. You should secure the power, then take which a...

Your vessel is entering port and you have steadied up on a range, dead ahead, in line with your keel. After a few minute...

What is the name given to lines on a chart which connect points of equal magnetic variation?

To what chemical family does ethylene oxide belong?

What is the required minimum length of the painter for a lifeboat in ocean service?

You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of positi...

You are entering an east coast port and see a buoy with a yellow triangle painted on it. What does the symbol indicate?