You are asked: what is the purpose of a "messenger line" when handling mooring lines, and why might it be used instead of passing the main mooring line directly?

A. Messenger lines are only used for anchor handling and have no application to mooring operations

B. A messenger line is simply a spare mooring line of the same size as the main line, kept for redundancy

C. A messenger line is a lighter, more easily handled line used to establish a connection between the vessel and the shore (or another vessel) before hauling across the heavier main mooring line, which may be too heavy, bulky, or difficult to throw or pass directly across a gap — the messenger reduces the physical effort and risk involved in passing heavy lines, and allows the operation to be carried out with fewer people at the receiving end initially

D. A messenger line is attached permanently to the berth and never moves between vessels

A. The tidal height at the time of transit to confirm sufficient under-keel clearance

B. The yacht's fuel consumption for that leg

C. The colour of the seabed shown on the chart

D. Only the distance to the next waypoint

A. Switch the ECDIS to standby mode and navigate by GPS position alone

B. Ignore it — ECDIS alarms are frequently false and can be left running

C. Assess the situation against the planned route and charted depths, take action to maintain safe water, and inform the Master if there is any doubt

D. Acknowledge and silence the alarm immediately so it does not distract the helmsman