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After much consideration, I have re-subscribed to the techdiver list. I have finally developed enough free time to put up with the (often) poor signal to noise ratio. Hopefully I will now be able to understand the references to this list in many of your private e-mails to me, and be able to reply without digging through the archives. Also, and I apologize for this, but I have a reply to a message that I received about a month ago, and have no idea who sent it. If you already had your question answered then my apologies for preaching to the choir. The message regarded the proper configuration of full face masks as primaries. (FFM's for deco are utilized identically to the WKPP procedures). This is how I do it: The FFM feeds from the short hose off the left post, to either side depending on the type and configuration of the mask. The hose should be the correct length to be just long enough to facilitate easy (in water) donning and doffing, and full range of head movement, while not having any excess hose. The half mask is worn backwards around the neck for bailout purposes. For this reason I prefer the FFM hose to feed to the left side of the mask (ie. AGA) so that the short hose does not catch on the half mask during a bailout. The long hose is clipped off to the right chest d-ring (readily available), unless you have bailed out to the half mask, in which case the long hose is routed around the neck and breathed, as in the standard Hogarthian configuration. Using quick disconnects and/or switch blocks to facilitate gas switches on FFM is an unacceptable safety risk, and hence they are only used for shallow (<40 msw) support divers with comms. to the surface support. FFM's ARE NOT TO BE USED DEEP UNDER ANY CIRCUMSTANCES. They have a high propensity to freeflow in the cold water, and contribute to 1st stage icing. Follow standard procedures with regard to the preparation and care of regs in sub zero conditions. (Reference archives for posts by Rob Robbins for more info on cold water procedures). -Sean T. Stevenson Seaman, Fast Response Search and Rescue crewperson (IRB) Canadian Coast Guard Coxswain, Prevention Officer, Training Officer Canadian Coast Guard Auxiliary, Unit 5 Coastal Search and Rescue Instructor Rescue Co-ordination Centre (Victoria) -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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