17-10 Change A U.S. Navy Diving Manual—Volume 4 Table 17-1.  Personnel Requirements Chart for Mixed-Gas Diving. Mixed-Gas UBA Dive Team Optimum Minimum Designation One Diver Two Divers One Diver Two Divers Diving Officer (Notes 3, 4) (Notes 3, 4) (Notes 3, 4) (Notes 3, 4) Diving Medical Officer (Note 5) (Note 5) (Note 5) (Note 5) Diving Supervisor 1 1 1 (Note 2) 1 (Note 2) Diver 1 2 1 2 Standby Diver 1 (Note 7) 1 (Note 7) 1 (Note 7) 1 (Note 7) Diver Tender 1 (Note 1) 2 (Note 1) 1 (Note 1) 1 (Note 1) Standby Diver Tender 1 1 (Note 8) (Note 8) Timekeeper/Recorder 1 1 EBS Operator (Note 6) (Note 6) (Note 6) (Note 6) Total Personnel Required 6 8 4 5 Notes: 1. One tender per diver when divers are surface tended. If using a buddy line, one tender is required for each buddy pair. 2. May act as timekeeper/recorder. 3. EOD Diving Officer is required on site for all EOD operations that involve a render safe procedure; for SPECWAR, a Diving Officer is not required on station. On station is defined as at the dive location. 4. Diving Officer may perform any other function simultaneously (i.e., Diving Officer/Diver). 5. A Diving Medical Officer is required on station for all dives exceeding the maximum working limit. 6. EBS Operator is for MK 16 in-water decompression dives. 7. At the Diving Supervisor’s discretion, the standby diver shall be fully dressed with the exception of scuba or MK 16, mask, and fins. These items shall be ready to don. 8. If the Standby Diver is deployed, the Diving Supervisor shall tend the Standby Diver. Table 17-2.  Equipment Operational Characteristics. Diving Equipment Maximum Working Limit (fsw) (Notes 1 and 2) Chamber Requirement MK 16 UBA 150 (air diluent) 200 (HeO₂ diluent) Note 3 Note 3 Notes: 1. Depth limits are based on considerations of working time, decompression obligation, oxygen tolerance and nitrogen narcosis. The expected duration of the gas supply, the expected duration of the carbon dioxide absorbent, the adequacy of thermal protection, or other factors may also limit both the depth and the duration of the dive. 2. A Diving Medical Officer is required on station for all dives exceeding the maximum working limit. 3. Dives deeper than the maximum working limits require a recompression chamber on station. On station is defined as at the dive location.