CHAPTER 6 — Operational PlanningChange A 6-25niques highlights the significant differences between the methods and outlines theeffect these differences will have on planning.6-7.2Operational Characteristics of Scuba. The term scubarefers to open-circuit airscuba unless otherwise noted. The main advantages of scuba are mobility, depthflexibility and control, portability, and reduced requirement for surface support.The main disadvantages are limited depth, limited duration, lack of voice commu-nications (unless equipped with a through-water communications system), limitedenvironmental protection, remoteness from surface assistance, and the negativepsychological and physiological problems associated with isolation and directexposure to the underwater environment.6-7.2.1Mobility. The scuba diver is not hindered by bulky or heavy equipment and cancover a considerable distance, with an even greater range through the use of diverpropulsion vehicles (DPVs), moving freely in any direction. However, the scubadiver shall be able to ascend directly to the surface in case of emergency.WARNINGScuba equipment is not authorized for use in enclosed space diving.Figure 6-13. Air Diving Techniques. A choice of three air diving techniques are available: open circuit scuba,surface-supplied gear (MK 20 MOD 0), surface-supplied deep-sea gear (MK 21 MOD 1), and surface-supplieddeep sea gear (EXO BR MS).OPEN-CIRCUIT SCUBANormalworking limit: 130 fswOperationalnecessity: 190 fswSURFACE-SUPPLIEDDEEP-SEA GEAR(MK 21 MOD 1)Normal working limit with EGS: 190 fswSURFACE-SUPPLIED GEAR(MK 20 MOD 0)Normal working limit with EGS: 60 fswSURFACE-SUPPLIED GEAR(EXO BR MS)Normal working limit: 190 fsw
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
