There is no such thing as stand-on or give-way in conditions of bad visibility, as this reminder explains.

Radar collision

Rule 19 of the International

Regulations for Preventing Collisions at Sea is often

dangerously misunderstood. Simpy put, there’s no

‘stand on’ vessel in fog.
If we see a target on a collision course

in sector A, we turn to starboard (unless we are overtaking

it) and if in sector B we turn to port. In the grey areas

we need to be very careful. Make large alterations in

course and/or speed and don’t assume the other vessel

has seen you – or understands Rule 19.

For a fuller explanation,

see John Williams’ article in PBO 396, p102-104.

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or alternatively by calling the PBO

Copy Service on 01202 440832.