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Wrolf, that is one specific case of low vis diving, if you want to call it that. I was referring more generally to blackwater diving operations involving tender directed searches, which are often in swift water and may be at night, and may not be directed from shore, in the case of a harbour or similar search. The light is for signalling in the unlikely event that the diver is disconnected from the tether, or if he should surface in trouble. -Sean On Wed, 20 Oct 1999 16:50:57 -0400, Wrolf Courtney wrote: >"Sean T. Stevenson" wrote: > >> On Tue, 19 Oct 1999 16:21:28 -0400, Wrolf Courtney wrote: >> >> >But in most low or no ambient light situations, take three. (Braille dives are an >> >exception - take none!) >> >> Actually, when diving in faceplate vis or blackwater, it is probably a >> good idea to carry a single backup light, for surface signalling. >> >> -Sean > >Good point, but I don't understand it. > >The no-vis dives that I am used to are for park lake clean ups. The vis is zero, >because the lakes are designed as reflecting pools, with thick mud on the bottom. > >The water is so shallow, much of the time you can just stand up. > >Surface support is to collect from you the garbage. You go to the surface, and they >come to you. Of course we do this in daylight, so a light is not necessary. > >Signalling from underwater is completely impractical. > >We do these as solo dives. Tethered diving is conceivable, but we do not do it. Buddy >diving is completely impractical. > >What scenarios are you thinking about where signalling surface support with a light is >useful? > > >-- >Wrolf Courtney >http://wrolf.net > > > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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