How many GMDSS communication areas exist?

• A. Four
• B. Two
• C. Three
• D. Five

Answer: (A)

GMDSS communication areas are four distinct zones defined by radio coverage, guiding what equipment and procedures a ship uses for distress, safety, and routine communications. Near shore, the system relies on line-of-sight VHF coast station coverage, which is the first area. Stepping further from land, MF/HF coast station coverage extends the reach into the next area. For broad, global reach, satellite networks cover a large central portion of the oceans, forming the third area. The remaining regions lie beyond satellite coverage, typically in high-latitude polar areas, where alternative methods are used, forming the fourth area. Because of these coverage differences, the number of these communication areas is four.