accommodation was cramped and they were not good sea boats.
'FISHER'S TOYS'
In an attempt to improve on these shortcomings, a larger vessel was designed, some 40 feet longer than A1, 10 inches more in beam, and of 100 tons greater displacement. This was the start of the B Class of which eleven were built between 1903 and 1906. The B Class were the first submarines to be fitted with deck casings.
Surface performance was improved over that of the A Class, but underwater performance was substantially the same.
The C Class followed and 38 were built between 1905 and 1910