Near miss: Absence of safety pin in the anchor swivel shackle

  • Safety Flash
  • Published on 17 September 2019
  • Generated on 2 April 2026
  • IMCA SF 22/19
  • 1 minute read

During planned modernisation of the stern anchor, it was discovered that the safety pin in the anchor’s swivel shackle was absent. 

What happened?

Positive action – Stop work authority – was exercised by the vessel crew.

There was a thorough visual inspection before work started, which allowed recognition that the anchoring equipment was in an unsafe condition.

it was discovered that the safety pin in the anchor's swivel shackle was absent
There was a thorough visual inspection before work started, which allowed recognition that the anchoring equipment was in unsafe condition.

What were the causes?

There was no regular planned maintenance scheduled for this piece of equipment.

The condition and availability of the anchor swivel safety pin was not part of the planned maintenance programme; thus, it had not been checked periodically.

What actions were taken? What lessons were learned?

  • A new safety pin was ordered and installed in the shackle within 12 hours.

  • Conduct immediate additional full inspection and check condition of anchor swivel’s shackle and availability of safety pin.

  • Ensure that the planned maintenance system (PMS) requires regular planned maintenance of anchoring equipment, including a check that the safety pin is in place and in good condition.

Latest Safety Flashes:

MAIB: Sinking of tug Biter with loss of two lives

MAIB has published Accident Investigation 17/2024 relating to the girting and capsize of tug Biter with the loss of two lives.

Read more
Dropped object – strop parted over sharp edge

A cylinder was lifted to a height of approximately 6 metres over deck of the vessel, the sharp steel edges of the cylinder cut through the firehose protection and caused the strop to part.

Read more
Person injured when pry bar slipped

A crew member who was applying downward pressure to their pry bar to lift a track, fell towards the deck when the pry bar slipped.

Read more
MSF: High potential near miss during FRC maintenance

The Marine Safety Forum has published Safety Alert 26-01 relating to an incident where there was an unplanned lowering of an FRC to the sea

Read more
BSEE: Crane incident leads to serious facial injuries

BSEE has published Safety Alert 512 relating to a crane incident during well abandonment which led to a worker being struck and suffering serious facial injuries.

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.