🔍 Key Concepts

• GMDSS sea areas and carriage requirements for compulsory vessels • When a vessel may be detained or prevented from sailing due to radio/safety equipment deficiencies • The difference between equipment duplication / shore-based maintenance and operational readiness

💭 Think About

• Which option describes a situation where the vessel CANNOT meet required GMDSS safety functions at the time of departure? • For each choice, ask: Does this condition directly affect the operational capability of the GMDSS system, or is it about something else? • Consider what the regulations say about replacing, testing, and logging GMDSS equipment before sailing — what has to be done before departure?

✅ Before You Answer

• Verify which conditions would cause the vessel to be unseaworthy in terms of GMDSS specifically (not general loading or manning issues). • Check whether duplication of equipment and shore-based maintenance are permitted methods of meeting GMDSS requirements, or reasons to hold the vessel in port. • Confirm whether new or repaired GMDSS equipment must be tested and properly logged before the ship is allowed to sail.