Communication Procedures & Protocols Flashcards

A vessel is transiting a VTS area and its AIS transponder fails. What must the operator do?

Answer: Notify VTS and maintain enhanced radio watch on the designated VTS channel

Loss of AIS must be reported to VTS; the vessel must maintain enhanced radio contact to compensate for the loss of automatic position reporting.

When a VTS operator issues a 'VTS Information' message, what type of authority does it carry?

Answer: Advisory — vessels receive guidance but retain decision authority

VTS Information is advisory in nature; vessel masters retain the conn and are responsible for their own navigation decisions.

Which phonetic alphabet word represents the digit '9'?

Answer: Niner

The digit 9 is spoken as 'Niner' in aviation and maritime radio to prevent confusion with the German word 'nein' (no).

What does a VTS operator mean when they tell a vessel to 'standby' on a VHF channel?

Answer: Remain on the current channel and await further communication

'Standby' instructs the vessel to remain listening on the current channel until called.

In VTS operations, what is a 'Vessel Traffic Service Instruction' (VTSI)?

Answer: A mandatory directive that a vessel must comply with under applicable law

A VTSI is a mandatory directive; failure to comply may result in legal action under applicable navigation regulations.

A tanker approaching port reports a hazardous cargo spill. Which urgency signal should precede the radio message?

Answer: Pan-Pan

Pan-Pan is the urgency signal for situations that are serious but not immediately life-threatening, such as a contained spill.

Under 33 CFR Part 161, what is the primary responsibility of a VTS operator during a navigational incident?

Answer: Provide timely, accurate traffic information to assist vessel operators

33 CFR 161 establishes that VTS operators provide traffic information; the vessel master retains command responsibility.