ABSTRACT
This chapter describes manned research of semi-closed-circuit rebreather with constant premix dosage during distance swimming and pressure tests.
Consistence of the assumed working parameters with the real parameters is tested with the same method as the stabilization and homogenization of the breathing gas composition.
The preliminary testing of the mathematical model of the breathing space in a diving apparatus was performed in almost normobaric conditions. Swimming in a swimming pool over distances of 50, 100, 200, 400, and 800 m was done at a depth not exceeding 1.1 m at maximal possible speeds adopted for a diver equipped with swim-fins.
In order to verify the correctness of the design assumptions, pressure tests without immersion of the diver were carried out. During the experiments the subjects performed exercises at the work rate of 2 W per 1 kg of body mass.
The pressure tests carried out in the swimming pool in the land-based diving complex were the next stage of the research carried out to verify the design assumptions.
The divers swam with the sub-maximal work rate. The divers tried to maintain work rate at the level that did not produce breathing disturbances.
