Coastal Forces of World War II


was a division of the Royal Navy established during World War II. It consisted of small coastal defence craft which the Navy designated with names such as: Motor Launch, High Speed Launch, air-sea rescue, Motor Gun Boat and Motor Torpedo Boat. It did not include landing craft, trawlers or purpose-built minesweepers. Other Navies operated equivalent boats, but classified and named them somewhat differently.
This article attempts to pull together, for comparative purposes, some statistics concerning the coastal forces of different navies. It starts with the above British definition of "Coastal Forces" and attempts to identify the equivalent boats in other navies.

Coastal Forces of the United Kingdom

TypeDesignationBuiltLostDesigned purpose
Motor LaunchesML, HDML ASRHarbour Defence Motor Launches and submarine chasing or for armed high speed Air Sea Rescue.
Motor Gun BoatsMGB
Steam Gun BoatsSGB71Hunting down German E-boats
Motor Torpedo BoatsMTB

Coastal Forces of the United States

TypeDesignationBuiltLostDesigned purpose
PT boatsPT-
Submarine chasersSC- and PC-

Coastal Forces of Germany

TypeDesignationBuiltLostDesigned purpose
Schnellboot S-
R boat

Coastal Forces of Italy

TypeDesignationBuiltLostDesigned purpose
MAS-boat
Motoscafo Silurante36

Coastal Forces of Japan

Post war

Post war there seemed to be no need for small coastal force vessels. They were generally withdrawn and their functions taken over by larger corvettes, frigates, and destroyers. A few remained in service with Third World navies. The RN's last boats built in any number were the Dark-class fast patrol boats of the mid-1950s; Coastal Forces was reduced in 1957 to a few vessels.
In time, the need for smaller vessels re-asserted itself, as in this experience of the Royal Australian Navy:
Coastal boats reappeared in navies around the world now generally adapted to the need to "patrol" and designated as "patrol boats".

Surviving craft

Following is a list of notable surviving coastal craft from World War II.
Vessel MGB81Country Great BritainType Motor Gun BoatDesign British Powerboat CompanyBuilt 1942In the care of Portsmouth Naval Base Property TrustNotes
HNoMS HitraNorwaysubmarine chaserOnly remaining World War II submarine chaser with intact armament
S-130GermanyE-boat1943British Military Powerboat TrustOnly surviving German E-boot. Participated in Exercise Tiger and attacks on the D-day invasion fleet.
PT 617USPT-boat80-foot ElcoBattleship Cove MuseumOnly completely restored 80-foot Elco PT-boat in existence
PT 796USPT-boat78-foot HigginsBattleship Cove Museumrestored
MTB 102UKMTBPrivate venture1937MTB 102 Trustcapable of 48 knots unladen