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It is our assumption the reader is a qualified diver. We highly recommend that all divers should train, under controlled conditions, in the use of any model of commercial diving helmet that they have not previously used or trained in, prior to use on the job. WARNING 3.1 Introduction This section provides advice on how to use your Kirby Morgan helmet. The use of these diving helmets will vary with the type of work and environmental conditions. The basic procedures of donning and removing these h