USS Cassin (Torpedo Boat Destroyer No. 43) stands off Queenstown, Ireland in 1917.

Length: 305' 3" overall.

Beam: 30' 4" extreme.

Displacement: 1,010 long tons normal.

Draft: 9' 4" mean.

Propulsion machinery: direct drive steam turbines; 15,000 shp; 2 shafts.

Designed speed: 28.3 knots.

Fuel bunkerage: 312 tons.


Torpedo battery: 8 x 18-inch torpedo tubes in four trainable twin mounts.

Gun battery: 4 x 4-inch/50 caliber rapid fire guns in single pedestal mounts.

The US Navy’s first class of 1,000-ton torpedo boat destroyers was also its first to mount a new 4-inch rapid fire gun. Four ships (torpedo boat destroyers Nos. 43–46) were authorized in March 1911 and completed in 1913: Cassin and Cummings from Bath, Downes from New York Shipbuilding and Duncan from Fore River.
Cassin class

Oil-fired boilers provided steam to direct drive turbines, which propelled two screws. The Bath-built ships also had a triple expansion reciprocating engine that could be clutched to one screw for economical cruising.

The class operated in World War I. On 15 October 1917, Cassin was torpedoed by the German submarine U-61 south of Mine Head, Ireland, but was repaired and returned to service in July 1918.

Post-war, the class was laid up. Cassin, Cummings and Downes were loaned to the Coast Guard as CG-1, -3 and -4 from 1924 through 1931–33. All six ships were scrapped in 1934–35.

1 Bureau of Construction and Repair’s General Information book for USS Cassin.
2 Bauer and Roberts.