Coast Guard Communications Flashcards
6 cards from real Coast Guard Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Coast Guard Communications flashcards as text
What is an MMSI number and why is it important?
Answer: A 9-digit Maritime Mobile Service Identity used to identify a vessel in DSC and AIS transmissions
An MMSI is a unique 9-digit number assigned to a vessel's radio, used in DSC distress calls and AIS transmissions, allowing the Coast Guard to identify the vessel instantly.
What is AIS and what information does it broadcast?
Answer: Automatic Identification System; broadcasts vessel identity, position, course, speed, and other data
AIS (Automatic Identification System) automatically broadcasts a vessel's identity, position, speed, course, and other data to nearby vessels and shore stations.
When is a ship station radio license required for a US vessel?
Answer: When the vessel travels to foreign ports, carries more than 6 passengers for hire, or is required by federal law
A ship station license is required for US vessels operating in foreign waters, carrying passengers for hire, or when otherwise required by law; pleasure boats in US waters only are generally exempt.
What is the purpose of the Global Maritime Distress and Safety System (GMDSS)?
Answer: To ensure vessels can send and receive distress alerts and safety information worldwide
GMDSS is an internationally agreed-upon set of safety procedures, equipment, and communication protocols ensuring that distress alerts and safety information reach rescue authorities worldwide.
What radio watch must all vessels equipped with a VHF radio maintain while underway in US waters?
Answer: Continuous watch on Channel 16
Federal regulations require all vessels equipped with VHF radios to maintain a continuous watch on Channel 16 while underway, except when actually communicating on another channel.
What does 'radio silence' mean in an emergency?
Answer: All stations must cease transmissions that could interfere with a distress message in progress
When a MAYDAY is in progress, the controlling authority may impose radio silence (SEELONCE MAYDAY), requiring all other stations to stop transmitting on that frequency until released.