13-12 Change A
U.S. Navy Diving ManualVolume 3
Minimum Required Equipment. Minimum required equipment for the pool phase
of dive training conducted at Navy diving schools may be modified as necessary.
Any modifications to the minimum required equipment listed herein must be
noted in approved lesson training guides.
MK 21 MOD 1 helmet or EXO BR MS full face mask with tethered umbil-
Thermal protection garment
Swim fins or shoes/booties
EGS bottle with submersible tank pressure gauge
Integrated divers vest/harness
MK 21 MOD 1 and EXO BR MS Surface Supplied Helium-Oxygen Description.
Principle of Operation:
Surface supplied open circuit mixed gas
Adequate mixed gas supply
Master Diver required on station
for mixed gas operations
Diving Medical Officer required
on-site for dives deeper than 300
Recompression chamber required
Planned exceptional exposure
dives or dives exceeding normal
working limits require CNO ap-
Breathing gas heater
Hot water suit
Figure 13-4. MK 21 MOD 1 UBA.