6-18 Change A
U.S. Navy Diving Manual—Volume 2
A resting diver (SDV OPS):
NOTE
In cases of SDV and DDS operations, thermal loading may change
during the course of the mission. Exposure times should be reduced
and fluids replaced during the dive when possible.
88°-94°F - limited to canister/O2 bottle duration.
94°-97°F - limited to canister/O2 bottle duration.
97°-99°F - limited to two hours based on physiological limits.
MK 16 UBA A working diver:
88°-94°F - limited to canister duration as specified in Table 17-4.
94°-97°F - limited to three hours based on physiological limits.
97°-99°F - limited to one hour based on physiological limits.
A resting diver (SDV OPS, during decompression):
88°-94°F - limited to canister duration as specified in Table 17-4.
94°-97°F - limited to canister duration as specified in Table 17-4.
97°-99°F - limited to two hours based on physiological limits.
Viper VSW UBA A diver working at a moderate rate, swimming at 0.8 kts or
less:
88°-94°F - limited to canister duration.
94°-97°F - limited to three hours based on physiological limits.
97°-99°F - limited to one hour based on physiological limits.
A resting diver:
88°-94°F - limited to canister duration.
94°-97°F - limited to canister duration.
97°-99°F - limited to two hours based on physiological limits.
SCUBA and Surface Supplied (MK 21, MK 20, EXO BR MS) A diver
working at a moderate rate, swimming at 0.8 kts or less:
88°-94°F - limited to diver's aerobic endurance.
94°-97°F - limited to three hours based on physiological limits.
97°-99°F - limited to one hour based on physiological limits.
A resting diver (during decompression):
88°-94°F - unlimited duration.
94°-97°F - limited to eight hours based on physiological limits.
97°-99°F - limited to two hours based on physiological limits.
6-6.3.2
Mission Planning Factors. The following mission planning factors may mitigate
thermal loading and allow greatest utilization of the exposure limits:
1.
Conduct diving operations at night, dusk, or dawn to reduce heat stress
incurred from sun exposure and high air temperatures.
