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Jack, dont mean to piss you off, but what you are really saying here is that you are in agreement with both my original statement and TRey's- thanks for letting us know you are on board with the compass and reel thing. now, do you irish have flush toliets yet?or do you still rely on the tried and true hole in the living room floor?< been doing it for hundreds of years now eh?> and the tutorial is great, perhaps you could go over alternate air source and fin pivots while you are at it? and maybe situational awareness? best, Al Marvelli jack wrote: > >>orientation? to what? all the other large hunks of > >metal? > >>I was always taught < boy scouts, military, then > >scuba> to take a bearing on > >>an object in the distance and navigate to it. You > >just cant do that in three > >>ft vis, like on the Tiger that night, unless all you > >intend on doing is > >>shooting azmiuths especially when the vis is bad in > >the entire water column< > >>which does happen> and you cant rise above it. > > Al,not wishing to ruffle any feathers here but, G eorge is right (as > usual). You descend on the wreck(dive site), vis is shit, maybe 3ft/10ft. > First, orientate yourself and buddy. Take a bearing from compass, lets say > its 090 degrees, which means you are heading east.Now before the dive you > already know the lie of the wreck, i.e. east/west, north/south etc.So its > easy to corellate the reading on compass to true.So you head off on your > bearing, checking direction as you go, time as well.Return on reciprocal > bearing, 270 degrees ,adjusting as you return. > In shit vis you should be reeled off on shot line as well,your compass is > your back up.Always take a bearing in case your line breaks/gets severed on > sharp edges. > Change in bearing should be timed off and return in elapsed time on > reciprocal bearing to pick up original bearing, allowing for current run > etc.Guys sail around the world using these gizmos, been doing it for > hundreds of years now, still works regardless. Best, Jack. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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