Skip to content

High potential near-miss during back loading

A member has reported a high potential near miss incident which occurred during the back loading of a crane boom section from an offshore installation. Although no injuries were sustained as a result of this incident, two members of the deck crew working on the main deck at this time could potentially have been fatally injured.

A platform supply vessel (PSV) was alongside an offshore installation back loading a section of a crane boom. The crane boom section was first landed on deck with no clearance from adjacent tote tanks. However, it was necessary for deck crew to pass between these tote tanks and the crane boom section to access the crane hook for unlatching. Therefore, the crane operator was asked to move the back loaded crane boom section towards the port side of the main deck to create a safe gap to allow the crew members clear access.

The crane operator moved the back loaded crane boom section 1-2m to port and asked the bridge whether the new position was satisfactory. The bridge then confirmed with the deck crew that this new position was acceptable for them and advised the crane operator accordingly. The crane wire was then slackened and the crew members started to pass between the back loaded crane boom section and the nearby tote tanks to unlatch the crane hook.

Crane boom section
Crane boom section
Crane boom section and tote tanks
Crane boom section and tote tanks

The crane operator then started to heave and raised the back loaded crane boom section by about 1m to approximately waist height whilst personnel were between the crane boom section and the tote tanks. There was very high potential for the two crew members to be crushed between the crane boom section and the tote tanks. A warning was given on UHF radio to the crew members, who were already aware of the hazardous situation and were already moving to a safe position. The crane operator then lowered the crane boom section to deck. Weather conditions at the time of the incident were within acceptable working limits, consisting of wind speed 19 knots and significant wave height of between 1.5 and 2.0m.

Further investigation revealed the following:

  • The crane operator lifted the back loaded crane boom section off the deck but failed to effectively communicate his intention to the vessel personnel;
  • The crane operator assumed that the deck was clear of personnel.

The following recommendations were made:

  • Crane operators should:
    • communicate their intentions to all relevant installation and vessel personnel before proceeding with any lifting operation
    • ensure that all communications are fully understood and verified by all relevant installation and vessel personnel before proceeding with any lifting operation
    • avoid making assumptions and verify that the deck area is clear of all personnel before proceeding with any lifting operation

Members are also referred to the following IMCA publications:


IMCA Safety Flashes summarise key safety matters and incidents, allowing lessons to be more easily learnt for the benefit of all. The effectiveness of the IMCA Safety Flash system depends on Members sharing information and so avoiding repeat incidents. Please consider adding [email protected] to your internal distribution list for safety alerts or manually submitting information on incidents you consider may be relevant. All information is anonymised or sanitised, as appropriate.

IMCA’s store terms and conditions (https://www.imca-int.com/legal-notices/terms/) apply to all downloads from IMCA’s website, including this document.

IMCA makes every effort to ensure the accuracy and reliability of the data contained in the documents it publishes, but IMCA shall 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.