Technical specifications for the Lightship Overfalls, owned by the OMMF in Lewes, DE

Vessel Name: Overfalls (LV118/WAL539)

Built: 1938 at Rice Brothers Shipyard, East Boothbay, Maine

Cost: $223,900

Mast: Single

Dimensions: Length 114'; beam (width) 26'; draft 13'4", weight 422 tons.

Engine: Single Cooper-Bessemer 400 hp, 8 cylinders with air starter.

Propeller: 7'2" diameter gear-driven

Maximum Speed: 9 knots (between 10 and 11 mph)

Light: Dual 375 mm electric lens lanterns located 57 feet above the water line and rated at 15,000 candle power (1,000 watts).
Flashed every 3 seconds at night, visible for 12 miles on a clear night.

Fog Horn: Dual air diaphones, switchable to single horn with a range of 5 miles.

Radio Beacon (transmitter): range of 25 miles.

Radar: RCA surface unit installed 1943 with a range of 15 miles.

Main Anchor: 7,000 pound mushroom type; auxiliary anchor 3,000 pounds.

Crew: 14 men served 2 weeks on and one week off.

Fuel Capacity: 10,500 gallons of diesel in 10 fuel tanks.

Fresh Water Capacity: 6,500 gallons in 4 fresh water tanks.

Ballast Tanks: 4 each with a total capacity of 10,000 gallons sea water.