Question 16 GLI01 - Master-Unlimited Tonnage

The Correct Answer is C 1. **Why option C ("navigating in or near an area of restricted visibility") is correct:** The steering and sailing rules for vessels in restricted visibility (specifically Rule 19 of the COLREGs – International Regulations for Preventing Collisions at Sea) apply to **all vessels** when they are navigating **in or near an area of restricted visibility**. This Rule mandates specific actions, such as proceeding at a safe speed adapted to the circumstances and conditions of restricted visibility, and having engines ready for immediate maneuver. The application is based purely on the environmental condition (restricted visibility) and the location relative to that condition, ensuring preparedness before entering the area. 2. **Why the other options are incorrect:** * **A) only if they have operational radar:** Rule 19 applies to all vessels, regardless of whether they are equipped with radar. While radar-equipped vessels have additional responsibilities (such as taking action based on radar information to avoid collision), the fundamental rules for navigating in restricted visibility apply universally. * **B) in sight of one another in fog:** If vessels are "in sight of one another," Rule 19 (Restricted Visibility) ceases to apply, and instead, Rules 11 through 18 (Conduct of Vessels in Sight of One Another) take effect, even if the visibility condition (like fog) still exists. * **D) only if they are showing special purpose lights:** The application of the restricted visibility rules is determined by the environmental condition, not by the type of lights a vessel is displaying. All vessels must follow Rule 19 in these conditions; special purpose lights (like those for fishing, dredging, etc.) simply indicate the status of the vessel.