possible Stonefish Mine info

[Rudd]

5.Stonefish Mk.III mine. Stats? Specifically type (bottom?), triggers, operational depth and warhead.

Not sure if below is the Mk.III version or not

According to a statement made to the UK Parliament in 2002:

"...the Royal Navy does not have any mine stocks and has not had since 1992. Notwithstanding this, the United Kingdom retains the capability to lay mines and continues research into mine exploitation. Practice mines, used for exercises, continue to be laid in order to retain the necessary skills".

However, a British company (BAE Systems) does manufacture the 'Stonefish' influence mine for export to friendly countries such as Australia, which has both war stock and training versions. The computerised fuze on a Stonefish mine contains acoustic, magnetic and water pressure displacement target detection sensors. Stonefish can be deployed by fixed-wing aircraft, helicopters, surface vessels and submarines. A optional kit is available to allow Stonefish to be air-dropped, comprising an aerodynamic tail-fin section and parachute pack to retard the weapon's descent. The operating depth of Stonefish ranges between 30 and 200 metres. The mine weighs 990 kilograms and contains a 600 kilogram aluminised PBX explosive warhead. The shelf life of a Stonefish mine is 20 years, and it has an operational lifetime of 700 days after being deployed on the seabed. Stonefish incorporates arming delays, ship counting and self-sterilisation features which can be configured by the user.

from http://www.worldwideinvention.com/artic ... rines.html
possible source for above - Hansard Written Answers, 4 November 2002. Available on-line at www.publications.parliament.uk

[Rudd]

almost same article in above link http://www.bluebird-electric.net/submar ... asures.htm

but

Modern influence mines such as the BAE Stonefish are computerised, with all the programmability that this implies e.g. the ability to quickly load new acoustic signatures into fuses, or program them to detect a single, highly distinctive target signature. In this way, a mine with a passive acoustic fuse can be programmed to ignore all friendly vessels and small enemy vessels, only detonating when a very large enemy target passes over it. Alternatively, the mine can be programmed specifically to ignore all surface vessels regardless of size and exclusively target submarines.

[Rudd]

There's also http://en.wikipedia.org/wiki/Stonefish_%28mine%29

Considering there's a wiki page, I'm guessing these probably aren't referring to the Mk.III