Which communications functions must all vessels be capable of performing under GMDSS as defined by the International Maritime Organization?

Correct Answer: Option D — Distress alerting to and from vessels, search and rescue coordination, on-scene communications, signals for locating, Maritime Safety Information, general and bridge-to-bridge communications.

Under USCG National Maritime Center examination standards, the accepted correct answer is: Distress alerting to and from vessels, search and rescue coordination, on-scene communications, signals for locating, Maritime Safety Information, general and bridge-to-bridge communications..