CHAPTER 13 — Mixed Gas Operational PlanningChange A 13-1C H A P T E R 1 3Mixed Gas Operational Planning13-1INTRODUCTION13-1.1Purpose. This chapter discusses the planning associated with mixed gas divingoperations. Most of the provisions in Chapter 6, Operations Planning, also apply tomixed gas operations and should be reviewed for planning. In planning any mixedgas operation, the principles and techniques presented in this chapter shall befollowed.13-1.2Scope. This chapter outlines a comprehensive planning process that may be usedin whole or in part to effectively plan and execute diving operations in support ofmilitary operations.13-1.3Additional Sources of Information. This chapter is not the only source of infor-mation available to the diving team when planning mixed gas diving operations.Operation and maintenance manuals for the diving equipment, intelligencereports, and oceanographic studies all contain valuable planning information. Thenature of the operation will dictate the procedures to be employed and the plan-ning and preparations required for each. While it is unlikely that even the bestplanned operation can ever anticipate all possible contingencies, attention to detailin planning will minimize complications that could threaten the success of amission. 13-1.4Complexity of Mixed Gas Diving. Mixed gas diving operations are complex,requiring constant support and close coordination among all personnel. Due toextended decompression obligations, mixed gas diving can be hazardous if notproperly planned and executed. Seemingly minor problems can quickly escalateinto emergency situations, leaving limited time to research dive protocols or oper-ational orders to resolve the situation. Each member of the diving team must bequalified on his watch station and be thoroughly competent in executing appli-cable operating and emergency procedures. Safety is important in any divingoperation and must become an integral part of all operations planning.13-1.5Medical Considerations. The Diving Officer, Master Diver, and Diving Super-visor must plan the operation to safeguard the physical and mental well being ofeach diver. All members of the team must thoroughly understand the medicalaspects of mixed gas, oxygen, and saturation diving. A valuable source of guid-ance in operations planning is the Diving Medical Officer (DMO), a physiciantrained specifically in diving medicine and physiology. Mixed gas diving entails additional risks and procedural requirements for the diverand the support team. At the surface, breathing a medium other than air causesphysiological changes in the body. When a diver breathes an unusual mediumunder increased pressure, additional alterations in the functioning of the mind andbody may occur. Each diver must be aware of the changes that can occur and how
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