九潛一深

Dive1: Swim the outside of a wreck, proper buoyancy, identify and avoid hazards. Navigate so ascent point can be located without surfacing. Maintain neutral buoyancy and body position to avoid bottom / wreck (silting). Dive2: Swim along the outside, buddy team, identify, avoiding hazards with buddy, map the wreck, note point of interest. Survey wreck for penetration dive, possible entrances. Navigate on wreck, return to ascent point without surfacing. Dive3: Demonstrate deployment and retrieval of penetration line, on outside, in buddy teams. Swim along the penetration line, maintain buoyancy and body control, no silt, holding dive light. Navigate, return to ascent point without surfacing(tank pressure, NDL, where?) Dive4: Plan and perform actual penetration under direct supervision. Determine air supply and penetration limits. Maintain contact with the line. Navigate, return to ascent point without surfacing.