Submarine escape training facility

[1][2] The facility, located at Fort Blockhouse, Gosport opposite HMNB Portsmouth,[3] includes a fresh, chlorinated water column with a single escape chamber (as fitted to some classes of RN submarines) mounted at the base, through which students can conduct a fully representative escape cycle from 100 feet (30 m), closely replicating actions which would be required if forced to abandon a distressed submarine from depth.

Training includes ascents from increasing depths as a major element, but in addition is underpinned by lectures and practical training in how to survive within a disabled submarine, operation of emergency equipment and survival techniques on reaching the surface – a package of potentially life saving skills.

Over the years, the SETT has been used to train submariners from Italy, USA, Greece, Canada, Israel, Russia, Venezuela, Turkey, Australia and the Netherlands – with the staff and facility enjoying a worldwide reputation for excellence and good practice.

[8] In addition, the SETT has been used frequently for both underwater equipment testing, and to support media activity – notably hosting Blue Peter on a number of occasions, with some presenters completing ascent training.

The towers were also used to train scuba equipped divers (SEALs) or Underwater Demolition Teams to access or egress the submarine during special operations.

[13] Since 2013 there is a submarine escape training tank situated next to non-profit swimming pool Het Heersdiep in Den Helder, The Netherlands.