A primary operational requirement within Dive Control is that the Diving Supervisor maintains direct, uninterrupted access to an approved complement of certified pressure monitoring instruments. Diver depth gauges must feature dual-scale calibration in meters of sea water (msw) and feet of sea water (fsw) to ensure precise depth monitoring across standard diving tables. Within the Decompression Chamber system, dedicated Life Support and Caisson Gauges monitor internal chamber pressure to verify decompression schedules. Furthermore, all primary and secondary breathing gas lines must incorporate dedicated indicating gauges with dual-scale bar and psi dials, segmented into High-Pressure circuits (200 to 300 bar) for gas storage banks and Low-Pressure circuits (5 to 60 bar) for regulated diver supply feeds.