You are not logged in.

Dear visitor, welcome to WesWorld. If this is your first visit here, please read the Help. It explains in detail how this page works. To use all features of this page, you should consider registering. Please use the registration form, to register here or read more information about the registration process. If you are already registered, please login here.


Friday, November 17th 2006, 3:32pm

E.12. MTBs and Other Light Forces

Motor Torpedo Boat

Motor Gunboat

Harbour Patrol Craft


Friday, November 17th 2006, 3:32pm

[size=3]Motor Torpedo-Boats[/size]

MTB-1 Type


Design Date: 1922
Units: MTB-1 through -12 (1931), MTB-13- to -22 (1922) - deleted from service, 1945
Displacement: 41 t
Armament: 2x1 15 mm, 2x1 7.5 mm, 2 x 450 mm TT, 4 DC
Speed: 33.5 knots

MTB-23 Type


Design Date: 1926
Units: MTB-23 to -34 (1926), MTB-35 to 46 (1927)
Displacement: 40 t
Armament: 2x1 15 mm, 2x2 7.5 mm, 4 x 450 mm TT
Speed: 37 knots

Note: MTB 35-37 destroyed November 1945

MTB-47 Type


Design Date: 1929
Units: MTB-47 to -58 (1929)
Displacement: 40 t
Armament: 1x1 35 mm, 1x1 15 mm, 2x2 7.5 mm, 4 x 450 mm TT
Speed: 40 knots

Note: MTB 47-50 destroyed November 1945


Friday, November 17th 2006, 3:44pm

[size=3]Motor Gunboats[/size]

MGB-1 Type

India had a tough time dealing with the Italian-built MAS boats operated by Filipino revolutionaries in that recent event. India's own MTBs lacked the armament necessary to win a fight at equal numbers, and lost a few of their number during skirmishes. Using a destroyer to hunt down MAS boats was considered risky, given India's loss of the Thimphu to MAS torpedos during the Dagupan landings (and the loss of the cruiser Delhi to Danish MTBS a few years earlier).

A possible answer fell into the Indians' lap late in the Revolution, when a Red MAS was captured during a raid (see ~Q2 1929 news). Officially reported sunk, the MAS was quietly returned to India for repairs and evaluation at Port Blair.

After a year and a half of studies, the Indians decided to build a prototype version of their own for evaluation in a dedicated anti-MTB/MAS role. Thus the 10 cm gun on the original is replaced by a twin 35 mm gun, a second such weapon replaces the torpedos aft, and two 15 mm machine guns on pintle mounts are located amidships. Four depth charges are embarked to assist in escape from destroyers, and are controlled from the aft 35 mm station. A single 75 mm mortar, fixed to fire forward, is also installed for firing flares.

The single boat was built in secrecy in Q3 1931 and deployed to Sittwe, for trials with various Indian light craft. Three additional units were built in 1932 and are working up, with an expectation that the group will deploy to the Persian Gulf in early 1933. The original MAS will likely be turned over to the Philippines following its "unexpected discovery in a remote lagoon in the Phillipines".

(India will no doubt encounter the same seakeeping issues identified by Italy (in the Italian encyclopedia enty), but that will only come with time. And go easy on the drawing - I was working off the model photo in the Italian encyclopedia so was guessing at dimensions.)

Forward pits: 15 mm HMG each side
Aft pits: signal mast to starboard, forward firing mortar to port.


Design Date: 1931
Units: MGB-1 (1931), MGB-2, -3, -4 (1932)
Displacement: 75 tons
Armament: 2x2 35mm, 2x1 15 mm, 1x75 mm mortar, 2x2 DC
Speed: 35 knots (newer engine offset by imperfect reverse-engineering of the hull form)


Friday, November 17th 2006, 3:54pm

[size=3]Harbour Patrol Craft[/size]

By late 1932, the Bharatiya Nau Sena recognized the need for some light patrol vessels to provide security at Red Sea ports involved in the Asir struggle. As the Asirite fishing industry had been stuck in port due to the hazardous military situation, seven boats - and their crews - were leased.

Refits were carried out by the repair ship Otta, and were limited in scope: additional of a few light weapons and depth charges, a searchlight and blinker light, and any repairs or maintenance otherwise necessary to the craft. This latter aspect appealed to some boat owners who felt the risk of being shot at or sunk were outweighed by the benefits of a free overhaul.

The boats range in size from 41 t to 85 t standard. Smaller boats are equipped with two 15 mm machine guns and two depth charges. Larger boats also sport a 35 mm cannon.


Saturday, December 1st 2007, 1:14am

MTB-59 Type


Design Date: 1934
Units: MTB-59 to -68 (1934), MTB-69 to -72 (1936)
Displacement: 38 t
Armament: 2x1 35 mm, 2x2 15 mm, 6x1 7.92 mm, 4 x 450 mm TT
Speed: 39 knots

This post has been edited 2 times, last edit by "perdedor99" (Aug 13th 2008, 7:07pm)


Thursday, July 24th 2014, 5:59pm

MTB-73 Type


Design Date: 1941
Units: MTB-73-80 (1942), MTB-81-84 (1943)
Displacement: 40 t
Armament: 2x1 35 mm, 2x2 15 mm, 2x1 7.92 mm, 4 x 550 mm TT
Speed: 40 knots


Thursday, July 24th 2014, 6:01pm

MGB 5 Type


Design Date: 1942
Units: MGB-5-8 (1942), MGB-9-12 (1943)
Displacement: 80 tons
Armament: 2x2 35mm, 2x2 15 mm, 1x75 mm mortar, 2x2 DC
Speed: 37 knots

MGB-7 destroyed November 1945


Thursday, July 24th 2014, 6:02pm

MTB 85 Type


Design Date: 1945
Units: MTB-85-92 (1945) and -93 to 106 (1946)

Displacement: 50 tons
Armament: 2x1 35 mm, 2x2 15 mm, 1x75 mm mortar, 2x7 125 mm rocket cells, 4x1 550 mm TT, 2x2 DC
Speed: 40 knots
Sensors: Short-range surface-search radar

Note: Generally based on historical PT-625 class