Motor Mine-Sweeper MMS 140 foot type

The larger MMS 1001-type came to replace the original MMS-design from 1943.
Motor Mine-Sweeer (MMS) 1001-type Motor Mine-Sweeer (MMS) 1001-type

Towards the end of 1942 Admiralty decided to adopt the larger and more seaworthy 1001-type of MMS rather than the smaller 110-foot type.