NOTE Performing a careful dip test during predive setup is essential to detect system leaks Additionally dive buddies shall check each others equipment carefully before leaving the surface at the start of a dive

17-11.5 Decompression Sickness in the Water. Decompression sickness may develop in the water during MK 16 diving. The symptoms of decompression sickness may be joint pain or may be more serious manifestations such as numbness, loss of muscular function, or vertigo.

Managing decompression sickness in the water will be difficult in the best of circumstances. Only general guidance can be presented here. Management decisions must be made on site, taking into account all known factors. The advice of a Diving Medical Officer should be sought whenever possible.

17-11.5.1 Diver Remaining in Water. If the diver signals that he has decompression sickness but feels that he can remain in the water:

1. Dispatch the standby diver to assist.

2. Have the diver descend to the depth of relief of symptoms in 10-fsw increments, but no deeper than two increments (i.e., 20 fsw).

3. Raise the oxygen partial pressure in the rig manually to 1.3 ata.

4. Compute a new decompression profile by multiplying all stops by 1.5. If recompression went deeper than the depth of the first stop on the original decompression schedule, use a stop time equal to 1.5 times the first stop in the original decompression schedule for the one or two stops deeper than the original first stop.

5. Ascend on the new profile, controlling the rig manually at 1.3 ata until leaving the 20-fsw stop.

6. Lengthen stops as needed to control symptoms. Do not combine the 20-fsw and 10-fsw stops.

7. Upon surfacing, transport the diver to the nearest chamber. If he is asymptomatic, treat on Treatment Table 5. If he is symptomatic, treat in accordance with the guidance given in Volume 5, Chapter 21 (Figure 21-3).

17-11.5.2 Diver Leaving the Water. If the diver signals that he has decompression sickness but feels that he cannot remain in the water:

1. Surface the diver at a moderate rate (not to exceed 30 fpm).

2. If a recompression chamber is on site (i.e., within 30 minutes), recompress the diver immediately. Guidance for treatment table selection and use is given in Chapter 21.

If a recompression chamber is not on site, follow the management guidance given in Volume 5.MK 16 DIVING EQUIPMENT REFERENCE DATA

Figure 17-12 outlines the capabilities and logistical requirements of the MK 16 UBA mixed-gas diving system. Minimum required equipment for the pool phase of diving conducted at Navy diving schools and MK 16 RDT&E commands may be modified as necessary. Any modification to the minimum required equipment listed herein must be noted in approved lesson training guides or SOPs.

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