
1) Boat type 2) Ship of the Royal Navy
Found on
https://www.crosswordclues.com/clue/motor-launch

A motor launch (ML) is a small military vessel in British navy service. It was designed for harbour defence and submarine chasing or for armed high speed air-sea rescue. Although small by naval standards, it was larger than the preceding Coastal Motor Boats of 40 and 55 ft length. The first motor launches entered service in the First World War. Th...
Found on
http://en.wikipedia.org/wiki/Motor_Launch
No exact match found.