“B” CLASS.—These boats displace 314 tons, and have a surface and submerged speed of 13 and 9 knots respectively. They are armed with two torpedo tubes. Sixteen officers and men are carried.
“C” CLASS.—This class has a displacement of about 320 tons. Above water their speed is 14 knots, below it is 10 knots. They are fitted with two torpedo tubes, and have a crew of 16 officers and men.
“D” CLASS.—These are fairly new boats of about 550 tons displacement. On the surface the speed is 16 knots, below water it is 10 knots. They are armed with three torpedo tubes, and are also believed to have a quick-firing gun. The complement is about 20 officers and men.
“E” CLASS.
The “E” class comprises our latest boats, and no official details of the class have been published. The displacement, however, is about 800 tons, and the surface speed 16 knots. There are four torpedo tubes and two quick-firing guns, the latter being on disappearing mountings. About 25 officers and men are carried.
A.E. 1 and A.E. 2.
(Australian boats.)
These boats are identical with the “E” class.
NAUTILUS.
“F” CLASS.
SWORDFISH.
These boats, although not officially described, are known to be of extremely powerful type. They displace nearly 1,000 tons, can travel at 18 or 19 knots on the surface and 12 below, and are armed with six torpedo tubes and two guns. The complement is about 27 officers and men.