Theft from vessel at anchor

  • Safety Flash
  • Published on 28 May 2019
  • Generated on 21 February 2026
  • IMCA SF 12/19
  • 2 minute read

A vessel was boarded by thieves whilst at anchor at Callao, Peru. 

What happened?

The boarding was not noticed by the crew until they went forward to anchor stations to weigh anchor, at about 0445 hrs local time. The anchoring crew found the door to the forward mooring area was secured from the other side. The crew forced open the door by removing hinge bolts, first ascertaining that the intruders were no longer present.

The effectively secured access door to the mooring space restricted the intruders to the forepeak of the vessel. Following checks, it was found that mooring ropes were missing from the bosun store. 

The vessel managed to weigh anchor and complete further operations without any delay.

What went wrong? What were the causes?

  • It was assumed that the intruders most likely boarding and leaving was via anchor chain and by dislodging a poorly fitted hawse pipe cover. Other boarding possibilities, e.g. ladder and rope and grapnel, appear difficult in this incident.

  • The vessel confirmed maintaining anti-piracy watch, however, as watchkeepers monitored from the upper deck, it was inadequate for all parts of the vessel.

  • Such thieves commonly use small, silent and unlit wooden boats, which are difficult to spot on the radar.

What actions were taken?

Securing of hawse covering was upgraded to thwart such attempts.

hawse pipe cover securing (before)

Hawse pipe cover securing (before)

hawse pipe cover securing (after)

Hawse pipe cover securing (after)

hawse pipe cover securing (after)

Hawse pipe cover securing (after)

  • Vessel security patrol arrangement was amended to include precautions and routines for forepeak surveillance.

  • Reinforced bosun store skylight and door securing arrangements.

  • Ensured mooring spaces are maintained clear of all items that may be used as tools by thieves.

  • Stowed all loose mooring ropes, heaving lines and messengers inside bosun store at piracy prone anchorages/waiting areas.

  • Be seen to display vigilance, e.g. flashing high beam torches over-side, use of Aldis lamp or search lamp sweeps and security patrol blowing whistles.

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.