Figure 6-11. Water Temperature Protection Chart

6-16 U.S. Navy Diving Manual—Volume 2 Figure 6-11. Water Temperature Protection Chart. Water Temp Unprotected Diver Resting diver will overheat Thermal protection usually not the limiting factor in a wet suit Thermal protection usually not the limiting factor in a dry suit 5 hours 3 hours 5 hours 3 hours 1 hour * Below 40 F, hot water suit or dry suit is reccommended for surface-supplied diving Thermal protection usually needed below 80 F water Working diver may overheat depending on workload Wet Suit Diver (At shallow (<20fsw) depths) Dry Suit Diver WATER TEMPERATURE PROTECTION CHART C F 90 80 70 60 50 40 30 Freezing point Fresh water Freezing point Salt water -04.0 -01.0 01.5 04.5 07.0 10.0 13.0 15.5 18.5 21.0 24.0 26.5 29.5 32.0 35.0 Resting diver chills in 1-2 hours This chart can be used as a guide for planning dives in cold water. The dive durations listed for each suit . Instead they represent dive times that will challenge the average diver wearing the thermal protection listed, but will have a minimal chance of producing significant hypothermia. Acutal dive durations may be longer or shorter than those listed, due to operational considerations and/or individual tolerance. are not rules or limits