USS John S McCain did not send out automatic identification signals: Singapore authorities

SINGAPORE: A US warship involved in a collision with a Liberian-flagged oil tanker in Singapore waters did not send out signals about its movements, Singapore authorities said on Thursday (Sep 28).

The Transport Safety Investigation Bureau (TSIB) – a unit within the Ministry of Transport which looks into air and sea accidents – gave this update about one month after the accident between the USS John S McCain and an oil tanker. 

USS John S McCain and Liberian-flagged vessel Alnic MC collided at about 5.30am on Aug 21.

TSIB said it has reviewed the Maritime and Port Authority’s (MPA) Vessel Traffic Information System recordings and found that both vessels showed up on MPA’s radar.

The system pulls together data from various sources like radars and closed-circuit televisions, to present a comprehensive sea situation to officers monitoring maritime traffic.

The system can also capture Automatic Identification System (AIS) signals – which give details such as a ship’s speed and direction – from vessels.

TSIB said on Thursday that it only received AIS signals from Alnic MC, but not from USS John S McCain.

The statement, however, also said: “Mandatory carriage of AIS under the International Convention for the Safety of Life at Sea (SOLAS) is not applicable to ships of war and troop ships.”

When asked if the AIS signals were turned off on USS John S McCain, US Seventh Fleet public affairs officer Clayton Doss told Channel NewsAsia he could not comment, citing the ongoing investigation.


According to a US Naval Institute report, one of the immediate changes to US Navy fleet operations after recent collisions is that surface fleet ships will now announce their presence in shipping lanes with heavy traffic.

The US will also, for the first time, institute formal rest guidelines for sailors on ships, as part of a sweeping set of new rules based on an internal command message within the US…

Article Source…

Leave a Reply

Your email address will not be published. Required fields are marked *