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REGIA MARINA (ITALY)

COASTAL FORCES

"SVAN-Ansaldo 12ton type ("A" group 1st series) motor gun boats

MAS23 1916

Names

MAS23 - 52

Builders

Ansaldo, Genoa

Completed

1916: MAS23 - 51

1917: MAS52

Losses

MAS25 (2/5/1917), MAS28 (27/12/1916), MAS34 (27/4/1925), MAS49 (28/2/1917)

Transfers

none

Discarding

1920: MAS27, 32

1921: MAS42, 43

1922: MAS35, 37, 39

1925: MAS29, 33

1926: MAS23, 24, 26, 30, 31, 38, 40, 45 - 47

1928: MAS41, 44

1929: MAS36, 48, 50 - 52

  

Displacement normal, t

11.8

Displacement full, t

 

Length, m

16.0

Breadth, m

2.63

Draught, m

1.30

No of shafts

2

Machinery

Sterling petrol engines

Power, h. p.

400

Max speed, kts

18 - 22

Fuel, t

petrol

Endurance, nm(kts) 200(22)

Armament

MAS23 - 44, 46 - 52: 1 x 1 - 47/40 Hotchkiss, 1 x 1 - 6.5/80, 4 DC

MAS45: 1 x 1 - 37/20 Hotchkiss, 2 - 356 TT

Complement

8

Ship project history: So-called "12-ton" boats projected by A. Bisio (SVAN) and built by different builders in 1916-1918. Boats differed from each other by armaments and engines. Some (1, 4 and 6th series) were extra equipped with 10hp electric motors for silent running.

Modernizations: MAS45, ~1916: was armed with 1 x 1 - 47/40 Hotchkiss, 1 x 1 - 6.5/80, 4 DC.

Naval service: No significant events.

MAS33 1916

 

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