52 Alarm signals, including the ship’s whistle,
should be sounded on the approach of attackers. Alarms and signs of
response can discourage attackers. Alarm signals or announcements
which provide an indication at the point at which the attacker may
board, or have boarded, may help crew members in exposed locations
select the most appropriate route to return to a secure area. Announcements
made by the crew should be made in the working language of the ship.
53 The crew initial familiarization checklist
should specifically state the various alarms used on board the vessel,
the response and muster station to each of these alarms. The alarms
and alarm signals should be standardized throughout the fleet and
not be specific.