Question 46 ONC05 - Master or Mate of LT 200 GRT

The Correct Answer is D The required fog signal of **one prolonged blast followed by two short blasts** is the mandated signal for a **vessel not under command; a vessel restricted in her ability to maneuver (including a dredging vessel); a vessel constrained by her draft (International only); a sailing vessel; and a fishing vessel (when underway)**, as well as a towing or pushing vessel (when the tow is over 200m). This signal is detailed in Rule 35(c) of the COLREGs (International Regulations for Preventing Collisions at Sea). * **A) A vessel restricted in its ability to maneuver, at anchor:** Although the specific signal for a vessel at anchor is usually rapid ringing of the bell (Rule 35(g)), a vessel that is restricted in its ability to maneuver must give the signal specified in Rule 35(c) *in addition* to the anchor signal if it is important to indicate its restricted status (Rule 35(f) states that a vessel restricted in its ability to maneuver *may* substitute the Rule 35(c) signal for the anchor signal, or give both). Since a vessel restricted in its ability to maneuver is specifically listed in Rule 35(c), this option is covered. * **B) A sailing vessel underway:** A sailing vessel underway is explicitly listed in Rule 35(c) as one of the vessels required to sound the signal of one prolonged followed by two short blasts. * **C) A vessel not under command:** A vessel not under command is explicitly listed in Rule 35(c) as one of the vessels required to sound the signal of one prolonged followed by two short blasts. Since Options A (a vessel restricted in its ability to maneuver), B (a sailing vessel underway), and C (a vessel not under command) all require (or may require, in the case of A when anchored) this specific fog signal under Rule 35(c), **All of the above** (D) is the correct choice. *** **Why the other options are incorrect (as standalone answers):** * **A) A vessel restricted in its ability to maneuver, at anchor:** While correct that this vessel type uses the signal, it is incorrect because it excludes the other two vessel types listed (sailing vessel and NUC) which also use the signal. * **B) A sailing vessel underway:** While correct that this vessel type uses the signal, it is incorrect because it excludes the other two vessel types listed (restricted ability to maneuver and NUC) which also use the signal. * **C) A vessel not under command:** While correct that this vessel type uses the signal, it is incorrect because it excludes the other two vessel types listed (restricted ability to maneuver and sailing vessel) which also use the signal.