Robbery at anchor – vessel security

  • Safety Flash
  • Published on 2 October 2018
  • Generated on 14 February 2026
  • IMCA SF 23/18
  • 2 minute read

A members’ vessel was robbed whilst at anchor. 

What happened?

The incident occurred in Indonesian waters, in the hours of darkness, some three hours after anchoring. The duty officer, whilst on his rounds on the port side bridge wing, sighted a person on the poop deck. On being shouted at, the person tried to hide behind a ventilator.

The duty officer raised the alarm, alerting the Master and crew, and sent the duty AB down to check. While on the way down to the poop deck, the duty AB saw two more persons, armed with knives, who made threatening gestures to him. He immediately retreated back to the bridge.

On noticing that the crew were alerted and active, the intruders (5 in number) lowered some bags into boat, jumped overboard and escaped. A thorough search of the vessel was carried out for further unauthorised persons and for items lost. It was discovered that auxiliary engine spares to the value of around 12,000 USD, were missing. No crew were injured.

Padlock cut open
Padlock cut open
Engine room broken into

What were the causes?

Onboard investigation established that the intruders had boarded via the poop deck from a small boat, cut open the padlock securing the engine room entrance watertight door, and thus gained access to the engine room.

The incident was reported to concerned authorities. The Master and crew were aware of the risk of piracy in the waters through which the vessel was travelling and had implemented some counter-piracy measures. However, an effective deterrent – a deck piracy watch – had not been maintained.

What lessons were learned?

Our member recommended:

  • Pre-arrival security briefing should include anticipated threats and planning.
  • Vessel management should remain updated with world-wide maritime security concerns.
  • A deck piracy watch in locations known for piracy.

This is the first such security-based report passed to IMCA by members; there are no similar IMCA incidents to which members’ attention can be drawn.

Members are encouraged to submit incidents of this sort to IMCA in order to continue to raise awareness of vessel security.

Latest Safety Flashes:

Fall from height during mooring due to rope tension reaction

Rope became entangled with the propellor during mooring operations of a tanker causing the operator to lose balance and fall onto the lower platform.

Read more
Missing protection – progressive wear on hydraulic hoses causes damage

During an inspection, several hydraulic hoses and fuel hoses were found in direct contact with surrounding surfaces and sharp edges.

Read more
Small engine room fire – flammable object ignited

While ramping up the starboard main engine, a small flammable foreign object ignited.

Read more
Positive: damage to Fast Rescue Craft davit wire rope caught before failure

During routine checks, it was observed that the FRC davit wire rope had a visible fracture at the socket termination area.

Read more
BSEE: Miscommunication and trapped pressure causes injury during valve maintenance

BSEE has published Safety Alert 509 relating to a gas release incident on an offshore platform.

Read more

IMCA Safety Flashes summarise key safety matters and incidents, allowing lessons to be more easily learnt for the benefit of the entire offshore industry.

The effectiveness of the IMCA Safety Flash system depends on the industry sharing information and so avoiding repeat incidents. Incidents are classified according to IOGP's Life Saving Rules.

All information is anonymised or sanitised, as appropriate, and warnings for graphic content included where possible.

IMCA makes every effort to ensure both the accuracy and reliability of the information shared, but is not be liable for any guidance and/or recommendation and/or statement herein contained.

The information contained in this document does not fulfil or replace any individual's or Member's legal, regulatory or other duties or obligations in respect of their operations. Individuals and Members remain solely responsible for the safe, lawful and proper conduct of their operations.

Share your safety incidents with IMCA online. Sign-up to receive Safety Flashes straight to your email.