Precautions in Fog

Treat deteriorating visibility as a coordinated response: proceed at a safe speed, have engines ready for immediate manoeuvre, show navigation lights, make the required sound signals, and maintain a proper lookout by sight and hearing. Use radar if fitted and operational, monitor depth and position by all appropriate available means, and obtain and record a position promptly if circumstances allow.

Reduce speed. Under Rule 6, every vessel must proceed at a safe speed adapted to the prevailing visibility. Use a radar reflector where fitted or carried, and use radar or AIS if available. Put on lifejackets and consider clipping on harnesses.

Plot your position regularly using GPS. Monitor depth — your echo sounder is now a critical navigation tool. Consider anchoring if you are near shallow water and uncertain of your position.