METHOD FOR DIVING JOB EXECUTION USING DECOMPRESSION AT SURFACE Russian patent published in 2015 - IPC B63C11/00 B63C11/02 B63C11/32 

FIELD: transport.

SUBSTANCE: method includes diving job execution using decompression at surface by means of submersion to operating depth up to 60 m, diving job execution for 30-90 min and decompression with air breathing in water and on surface in pressure chamber. Water phase of decompression is conducted in continuous and stepped mode up to depth of 16-20 m with adherence to condition when nitrogen tension in liquid mediums and body cellular structures does not exceed external pressure value. Then, decompression is carried out continuously at the rate of 1.5-2 m/min up to surface at the value of body cellular structures oversaturation with nitrogen not exceeding 140 kPa for 3-5 min of stay on surface, within which divers are relocated to pressure chamber where pressure is increased up to 0.25-0.28 MPa, maintained for 30-60 min, whereupon decompression is carried out up to surface at the rate of 1-1.5 m/min when breathing medically pure oxygen in individual diving apparatus under condition that oxygen contents in breathing bag is 60-70%.

EFFECT: divers' safety during decompression at surface, higher efficiency of divers' labour.