NAVYPEDIA

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MAS2 1915  

Ships

Names	Builders	Completed	Losses	Transfers	Discarding
MAS1, 2	SVAN, Venezia: MAS1,2	12.1916: MAS1, 2	none	none	1922: MAS2 4.1928: MAS1

Technical data

Displacement normal, t
Displacement full, t	12.5
Length, m	16.0
Breadth, m	2.60
Draught, m	1.02
No of shafts	2
Machinery	2 Isotta-Fraschini petrol engines
Power, h. p.	450
Max speed, kts	23
Fuel, t	petrol
Endurance, nm(kts)	160(23)
Armament	3 x 1 - 6.5/115, 2 - 450 TT
Complement	8

Standard scale images

Graphics

Project history

Built by SVAN under A. Bisio project in 1915 prototypes of the large series of "12-ton" boats of type "A". Boats ran long trials from November, 1915 till December, 1916 and soon after commission were converted to minelayers.

For the first time they were equipped with 10hp electric motors for 4kts silent running, boats can pass 20 miles under batteries. In December, 1916 both were converted to minelaying boats: TTs were removed, one MG was replaced by 47mm gun, boat could carry 4 mines.

Modernizations

12.1916, both were converted to minelayers: - 1 x 1 - 6.5/80, 2 - 450 TT; + 1 x 1 - 47/40 H1901, 4 mines

1917, both: 2 Rognini electric motors for crouching were installed (10hp, 4kts)

1918, MAS2: armament consisted of 3 x 1 - 6.5/115, 2 - 450 TT, 4 DC

1919, MAS1: + 2 - 450 TT (ext tubes)

Naval service

MAS1 has sunk 25.4.1917 as a result of collision with MAS9. MAS2 foundered 29.10.1917 during a storm. Later (May, 1917 and November, 1917 respectively) both boats were raised and repaired.