When personnel signal discomfort, h

When personnel signal discomfort, hold the existing pressure for 5 min. If the discomfort does not cease after 5 min, reduce pressure gradually until the discomfort eases. If it persists, release the affected parties from the lock. No one should be subjected to a pressure greater than 50 psi. Decompression to normal atmospheric conditions must be in accordance with decompression tables. Table 18-3 shows the total decompression time for gauge pressures from 0 to 50 psi and working periods from 112 to 8 hours and over. Decompression proceeds by two or more stages, with a maximum of four for a working chamber pressure of 40 psi or over. Stage 1 consists of a reduction in ambient pressure ranging from 10 to a maximum of 16 psi, but in no instance will the pressure be reduced below 4 psi at the end of stage 1. This reduction in pressure in stage 1 will always take place at a rate not greater than 5 psi per minute. Further reduction in pressure will take place during stage 2 and subsequent stages as required at a slower rate, but in no event at a rate greater than I psi per minute.