Holland-class submarine vs Romeo-class submarine
Holland-class submarine
The Holland class were the first submarines built for the Royal Navy. They were built by Vickers, Barrow-in-Furness. The first three were designed by John Philip Holland. The Hollands were built under licence from the Holland Torpedo Boat Company/Electric Boat Company during the years 1901 to 1903. The Admiralty of the Royal Navy hoped to keep the Holland class a secret, and very few senior officers even knew of their existence. This led to the myth of the Admiralty not taking any interest in submarines. On the contrary, the Admiralty was well aware of the submarine's destructive potential. It therefore refrained from any submarine development program so as to avoid provoking similar programs on the part of foreign navies. Once those navies did begin serious submarine programs, the Admiralty had no choice but to begin its own.
Statistics for this Xoptio
Romeo-class submarine
The Project 633 class (known in the West by its NATO reporting name as the Romeo class) is a class of Soviet diesel-electric submarine, built between 1957 and 1961. A Chinese variant - Type 033 - was built in China from 1962 to 1984.