Hello all,
Yes, as PsychRN has pointed out, I am indeed "Bob" of MWR. I would like to clarify some issues relevant to the current discussion. First of all, while I am a SAR Diver, I am doing most of my work with Open Circuit SCUBA and surface supplied air. I am by no means a saturation diver. Saturation divers spend days to weeks living in a diving bell, hundreds of meters underwater, while breathing a helium mixture.
Yes, I did help design the SAR, but it was never designed for saturation diving. There is no helium release valve on the SAR, such as found on the Rolex Seadweller. The SAR watch was designed for the Canadian Government's SAR-Techs, and quite frankly they had no interest in a helium release valve. In that respect, the SAR was designed to their specifications culling knowledge from various experts from several fields including divers and engineers.
To clarify the issue with the "breached seal." I do not believe it happened under saturation diving conditions. If I recall correctly, it happened while wearing a hot suit, and alternating hot with very cold water. That is a very harsh test for almost any watch. I've personally tested the SAR to its rated depth using a static test chamber, and I have absolutely no qualms about using it on any operation I might be called to participate in.
The point to remember is that the SAR was built to a specification for a specific organization and my conversations with actual SAR-Techs indicates they have had no problems with the SAR under their actual day to day operations. That in a nutshell is all that is required of the SAR.