Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the the-events-calendar domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /home/storm/sites/dev-imca-int-com-1/public/wp-includes/functions.php on line 6114

Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the broken-link-checker domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /home/storm/sites/dev-imca-int-com-1/public/wp-includes/functions.php on line 6114

Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the woocommerce-eu-vat-number domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /home/storm/sites/dev-imca-int-com-1/public/wp-includes/functions.php on line 6114
Dead man anchor supplied unfit for purpose - DEV imca
Skip to content

Dead man anchor supplied unfit for purpose

A clump weight was sent to a member’s dive ship with the intention of it being used as a dead man anchor (DMA). The offshore manager correctly rejected the weight as not being fit for purpose for diving works on the grounds that it was unstable because of the limited steel base of the weight, in relation to its height.

This type of weight or ‘pill’ is part of a much bigger 50 tonne DMA, which is used for wire initiation. Its main frame holds four pills and is lowered to the seabed empty; thereafter each 11 tonne pill is inserted into the main frame. The steel frame on the bottom of each single pill is used for transportation purpose only and is not intended to act as sub-sea stability for the weight itself, which is lifted from the transport frame before being deployed on the sea bed.

The member advises that under no circumstances should this type of weight or other types which have an inadequate base size to height ratio, be used as a DMA; and that inspection of equipment to ensure its fitness for purpose is essential during the planning phase of a project.

Safety Event

Published: 1 October 2001
Download: IMCA SF 11/01

IMCA Safety Flashes
Submit a Report

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 safetyreports@imca-int.com 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.