Sub Marine Explorer

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Hull of the Sub Marine Explorer in Panama's Pearl Islands
History
Name	Sub Marine Explorer
Builder	Julius H. Kroehl and Ariel Patterson
Laid down	1863
Launched	1865
Acquired	1865
In service	1866
Out of service	1869
Fate	Abandoned
General characteristics
Displacement	80 tons
Length	12.0 m (39.4 ft)
Beam	3.3 m (11 ft)
Propulsion	single propeller
Speed	4 knots (7.4 km/h; 4.6 mph)
Complement	3 to 6

Sub Marine Explorer is a submersible built between 1863 and 1866 by Julius H. Kroehl and Ariel Patterson in Brooklyn, New York for the Pacific Pearl Company. It was hand powered and had an interconnected system of a high-pressure air chamber or compartment, a pressurized working chamber for the crew, and water ballast tanks. Problems with decompression sickness and overfishing of the pearl beds led to the abandonment of Sub Marine Explorer in Panama in 1869 despite publicized plans to shift the craft to the pearl beds of Baja California.