Collision Regulations Flashcards

In a head-on situation between two power-driven vessels (Rule 14), what action should each vessel take?

Answer: Both vessels should alter course to starboard so that each passes on the port side of the other

In a head-on situation, both power-driven vessels must alter course to starboard (right) so that they pass port-to-port. This is similar to road traffic passing on opposite sides.

Under Rule 18, which of the following vessels has the highest priority (least obliged to give way)?

Answer: A vessel not under command

The hierarchy under Rule 18 gives priority to: vessel not under command (highest), vessel restricted in ability to manoeuvre, vessel constrained by draught, fishing vessel, sailing vessel, power-driven vessel (lowest).

What is a 'crossing situation' under Rule 15, and which vessel must give way?

Answer: When two power-driven vessels cross so as to involve risk of collision — the vessel with the other on her starboard side must give way

In a crossing situation between power-driven vessels, the vessel that has the other on her starboard (right) side must give way. She should avoid crossing ahead of the other vessel.

What does five or more short and rapid blasts on a ship's whistle signify?

Answer: Doubt that the other vessel is taking sufficient action to avoid collision, or failure to understand intentions

Five or more short and rapid blasts is the danger or doubt signal under Rule 34(d). It is sounded when a vessel is unsure of the other's intentions or believes the other is not taking adequate action.

Under the COLREGs, what must the 'stand-on' vessel do?

Answer: Maintain course and speed, but be prepared to take avoiding action if the give-way vessel fails to act

Rule 17 requires the stand-on vessel to maintain her course and speed. However, she may take action to avoid collision if it becomes apparent the give-way vessel is not taking appropriate action.

What lights does a vessel at anchor display at night under the COLREGs?

Answer: An all-round white light, or if over 50m, two all-round white lights (one forward, one aft, with forward higher)

A vessel at anchor must display an all-round white light visible from all directions. Vessels over 50m must show two all-round white lights — one forward (higher) and one aft.