Your examiner asks: "What does SOLAS Chapter IV require regarding a reserve source of energy for GMDSS equipment, and how long must it last?"

A. SOLAS IV requires a reserve source of energy (typically batteries) capable of simultaneously powering the GMDSS radio installation — VHF, and MF/HF or satellite terminal as applicable, together with associated equipment such as AIS and the GPS/EPFS receiver — for a minimum period that depends on whether the ship also has an emergency source of electrical power meeting the relevant requirements: broadly, a SHORTER minimum duration (commonly cited as around 1 hour) applies where the GMDSS load is also backed by a compliant emergency generator, and a LONGER minimum duration (commonly cited as around 6 hours) applies where the GMDSS installation depends on the reserve source alone, without a qualifying emergency generator also available. The reserve batteries must also be capable of being recharged to the required minimum within a specified maximum time (commonly cited as around 10 hours), and their capacity must be checked at a specified periodic interval.

B. SOLAS IV requires no reserve source of energy at all for GMDSS equipment — the main ship's power supply alone is considered sufficient under all circumstances.

C. The reserve source of energy need only power a single VHF handset for 10 minutes, with no requirement to power AIS, GPS, or MF/HF/satellite equipment.

D. Reserve battery capacity, once installed, never requires periodic checking or testing for the life of the vessel.

A. Nothing — a test lift can proceed immediately after repairs

B. Testing should wait until cargo operations begin

C. The area within the grab's swing radius should be cleared of personnel before the lift

D. Only the crane operator needs to be aware the lift is happening

A. Who must remain clear of the exclusion zone while the lift takes place

B. The lunch schedule for the deck team

C. Only the weather forecast for the next watch

D. The cargo manifest for the next port