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"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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