The United States ' S-class submarines, often simply called S-boats (sometimes "Sugar" boats, after the contemporary Navy phonetic alphabet for "S"), were the first class of submarines with a …

The United States' S-class submarines, in the interwar and WW2, known as the S-boats (or "Sugar" boats) were the first class with a true mass production, and of a more versatile and larger design …

Jan 10, 2026 · This was the largest class of submarines built for the USN prior to WWII, and they became ubiquitous in every fleet operating area in the 1920's and 1930's. However, because they …

The Government’s design for the S-boats (sometimes called the “Bureau” design, after the Bureau of Construction & Repair) was built at Portsmouth Naval Shipyard and eventually commissioned as the …

The S class was a medium sized patrol submarine, designed with the proposed international restriction of 600 tons displacement in mind. Intended for use in north European or Mediterranean …

Planned as a compromise between a coastal defense boat and a full-fledged fleet submarine, the S-class were powered by twin diesel engines and electric motors on two shafts.

Sep 8, 2025 · Designed in the 1930s to replace the H-class submarines, these medium-sized patrol submarines became the most numerous class of submarine ever built for the Royal Navy, with 62 …