Mailing List Archive Mailing List Archive
ststev@uv*.uv*.ca* wrote:- > ... I would like to know a bit about the communications systems that you > people use. I have seen systems that cover the nose/mouth area like a > surgeon's mask, systems that are integrated into full-face masks, and > (admittedly cheap) systems that are integrated into a reg second stage. ... To talk underwater, I much prefer (plain English which I know already and a fullface mask), than (on top of all the other complications of diving and of whatever I am diving to do) have to learn a complicated sign language. Sign language can be ambiguous, and you can easily come to need to say something beyond the capacity of what sign language you have time to learn. A fatal (non-diving) example of that happened last century on a railway in Britain:- Train B followed train A. A went past signalman X and then through a tunnel and then past signalman Y. B followed close but broke down in the tunnel. X wanted to ask Y "Is second train out of tunnel?", but could not, as he had no code for it and no voice communication with Y. So he had to ask "Is train out of tunnel?", which was true, as A had come out. So train C was allowed into the tunnel at speed, and hit B, and there was a fatal crash. All for not having voice communication. When I have dived with a fullface mask, I carried an eyes-and-mouth diving mask as well as a snorkel. > As well, are those commercial-type diving helmets readily available to the > technical/recreational diving community? ... One sort of these is called a `Kirby-Morgan helmet'. When talking about divers' helmets, please distinguish (1) air-containing helmets from (2) scuba divers' safety helmets which don't exclude water or supply air but merely serve the same role as building site workman's helmets.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]