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Prior notice United Kingdom Supplies

PDM4 Obsolescence Recovery

Buyer: Defence Equipment and Support

Published
24 June 2025
Estimated value
£2,634,000
Place of performance
UK
Lots
1
Notice number
034705-2025
Reference
ocds-h6vhtk-054840
Official source
Official source

CPV codes

Description

There is a requirement for the Maritime Command & Control, Targeting, Navigation, and Communications Team (C2TNC) within Sense, Decide and Communicate (SDC) to provide obsolescence recovery for the Platform Data Management System 4 (PDM 4) fitted to Vanguard Class Submarines. PDM In-Service Support is currently provided through contract CSA/3049. PDM4 has been in operation since the early 1990s with an expected in-service period until 2015. The original Out of Service Dates (OSD) has been extended by up to 100%, and no provision of additional stores was made when the OSDs were extended. As a result, work is now required to address the high-risk obsolescence issues, where there are low stores and items which require regular Survey and Repair. Failure to do this will adversely impact the operational capability of the CASD Vanguard Class Submarines. Currently the two main areas of concern are (1) Power Supply Units (PSUs) of which there are three variants and (2) PEC SIOs. Both items are critical to the safe operation of PDM4.

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Frequently asked questions

What is the estimated value of this tender?
The estimated value published by the buyer is £2,634,000.
Who is the buyer of this tender?
The contracting authority is Defence Equipment and Support (United Kingdom).
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Data collected from official public procurement sources. Amounts as published by the buyer.