For GMDSS, which statement concerning compulsory vessels is TRUE?

Correct Answer: Option D — Vessels larger than 500 gross tons must carry certain additional GMDSS equipment than what a vessel between 300-500 gross tons must carry.

SOLAS Chapter IV and 46 CFR mandate stricter GMDSS equipment carriage requirements for vessels over 500 gross tons compared to smaller vessels between 300 and 500 gross tons, including additional redundant equipment installations for safety compliance.