Your vessel's gyro compass repeater on the bridge wing shows a heading that disagrees with the master gyro unit by several degrees. What should you do?

A. Assume the repeater is simply less accurate and continue to rely on the master unit only, without further investigation

B. Switch to the magnetic compass permanently and disregard the gyro system entirely

C. The discrepancy is normal and expected between a master unit and its repeaters

D. Treat the discrepancy as a genuine fault requiring investigation — check for a mechanical/electrical fault in the repeater or its synchro transmission, cross-check both against the magnetic compass and, if available, GPS-derived COG, and inform the Master; do not simply pick whichever reading is more convenient without understanding the cause

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. 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

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

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

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