INTERNATIONAL ONLY A signal of one...

🔍 Key Concepts

• International sound signals in the COLREGS/Navigation Rules, especially the rule covering maneuvering and warning signals • Which vessels have special identity signals (for example: pilot vessels, vessels in distress, vessels at anchor) • The difference between overtaking signals in a narrow channel and identity/indication signals that say what kind of vessel you are

💭 Think About

• Ask yourself: is this pattern of blasts (prolonged + short + prolonged + short) normally used to show what the vessel is, or to indicate how it intends to maneuver? • Review which type of vessel needs to make itself easily recognizable by sound even in poor visibility, and check what sound signal is assigned to it. • Compare the specific distress signals in the rules with this sound pattern—does this exact combination appear under distress in the regulations?

✅ Before You Answer

• Look up the sound signal patterns in the International Regulations for Preventing Collisions at Sea (COLREGS), Part D – Sound and Light Signals. • Verify the specific sound signals for a vessel in distress and confirm whether they match or differ from the pattern in the question. • Check the rule or annex that lists the identity signal for pilot vessels and the required sound signals for vessels at anchor in restricted visibility.

INTERNATIONAL ONLY A signal of one prolonged, one short, one prolonged, and one short blast, in that order is given by which vessel?

A vessel being overtaken in a narrow channel

A vessel in distress

A vessel engaged on pilotage duty underway

A vessel at anchor

🔍 Key Concepts

💭 Think About

✅ Before You Answer