what is arrow22c?

Answer 1

When the diver then starts exhaling into breathing chamber 21 through mouthpiece channel 22, as indicated by an **arrow 22c** in Figure 5F, there is a high pressure situation in the breathing chamber 21, i.e. the pressure inside breathing chamber 21 is higher than the pressure outside breathing chamber 21. The high pressure in breathing chamber 21 propagates toward the exhaust valve 28 in a direction indicated by an arrow 21b in Figures 5F and 5G.

Description of scuba apparatus ...