Thetis-class patrol boat

	USCGC Argo (WPC-100) underway during World War II, circa 1944.
Class overview
Name	Thetis class
Operators	United States Coast Guard
Built	1931–1934
In commission	1931–1967
Completed	18
General characteristics
Type	Patrol boat
Displacement	337 long tons (342 t) (1933) ; 350 long tons (360 t) (1945);
Length	165 ft (50 m)
Beam	25 ft 3 in (7.70 m)
Draft	7 ft 8 in (2.34 m) (1933); 10 ft 0 in (3.05 m) (1945);
Installed power	1,340 bhp
Propulsion	2 × Winton Model 158 6-cylinder diesels 1,340 bhp (1,000 kW)
Speed	11 kn (20 km/h; 13 mph) cruising; 16 kn (30 km/h; 18 mph) maximum;
Range	1,750 statute miles (14 knots); 3,000 statute miles (11 knots); 6,417 statute miles (6 knots);
Complement	44 (1933); 75 (1945);
Sensors &; processing systems	None (1933; SF radar (1945); QCO sonar (1945);
Armament	1933; 1 × 3-inch gun; 1 × 1-pounder gun ; 1941; 1 × 3-inch gun; 1 × Y-gun; 2 x depth charge tracks; 1945; 2 x single-mount 3-inch/50-caliber gun; 2 x single mount 20 mm/80 cannon; 2 x depth charge tracks; 2 x Y-guns; 2 x Mousetraps;

Thetis-class patrol boats, also called the Argo-class patrol boats, were a class of 18 steel-hulled cutters of the United States Coast Guard built from 1931 to 1934.

Class overview
USCGC Argo (WPC-100) underway during World War II, circa 1944.
Name	Thetis class
Operators	United States Coast Guard
Built	1931–1934
In commission	1931–1967
Completed	18
General characteristics
Type	Patrol boat
Displacement	337 long tons (342 t) (1933) 350 long tons (360 t) (1945)
Length	165 ft (50 m)
Beam	25 ft 3 in (7.70 m)
Draft	7 ft 8 in (2.34 m) (1933) 10 ft 0 in (3.05 m) (1945)
Installed power	1,340 bhp
Propulsion	2 × Winton Model 158 6-cylinder diesels 1,340 bhp (1,000 kW)
Speed	11 kn (20 km/h; 13 mph) cruising 16 kn (30 km/h; 18 mph) maximum
Range	1,750 statute miles (14 knots) 3,000 statute miles (11 knots) 6,417 statute miles (6 knots)
Complement	44 (1933) 75 (1945)
Sensors & processing systems	None (1933 SF radar (1945) QCO sonar (1945)
Armament	1933 1 × 3-inch gun 1 × 1-pounder gun 1941 1 × 3-inch gun 1 × Y-gun 2 x depth charge tracks 1945 2 x single-mount 3-inch/50-caliber gun 2 x single mount 20 mm/80 cannon 2 x depth charge tracks 2 x Y-guns 2 x Mousetraps