200518 The Use of VHF in Collision Avoidance 1

The Use of VHF in Collision Avoidance 1
MARS Report 200518

The Collision Regulations do not make any provision for discussion on VHF about the actions to be taken. As far as possible, the use of VHF in collision avoidance should be kept to a minimum. VHF can be used when it is not possible to take action as per Collision Regulations because of obstructions on the starboard side. In any case, the vessel should be positively identified. A reduction of speed should be preferred to communicating the intention on VHF.

While using VHF, the ship should be positively identified. This is done by flashing light at night or by reading the ship's name by day time. Automatic Identification System will also help in avoiding the confusion. Even if the action is agreed on VHF, both vessels have the responsibility of monitoring the actions until they are finally past and clear.