MTB 256 JS White

[Conundrum]

MTB 256 was built by JS White in Cowes to a 'modified Vosper' design.

What was the specification for MTB 256 and her sisters. How were they different from the Vosper boats?

What was the record for MTB 256?

[cdsc123]

See the specs here;

http://uboat.net/allies/warships/class/643.html

The main difference was the flush deck design and the different motors (Stirling Admirals rather than Packards).