Błotniak

Błotniak (Polish for "Harrier") is a one-man wet cabin underwater craft designed in Poland in 1978. It was based in the torpedo research centre in Gdynia (commonly called Formoza).

Specification

 * propulsion:
 * two batteries of compressed air accumulators in the tubes on the sides of the craft
 * one set of ducted contra-rotating propellers
 * one electrical motor as a source of power for the propeller
 * equipment:
 * two spotlights
 * 2 sonars (passive and active)
 * depth-levelling system
 * maximum speed: 5 kn
 * range: 50 nmi
 * load capacity: 200 kg