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David et al,
As some have alluded to, the most useful info (and the
most difficult to obtain) would be ground velocity which consists of
both speed and direction. As we all are very aware, one can encounter
currents from ahead, behind, and the side which can approach or exceed the
speed of the sub. Particularly in conditions of low visibility, I can
imagine how difficult it could be to systematically cover a search grid or
navigate to the desired resurfacing point. Yeah, want-to's can get
expensive.
In aviation the same factors exist, but usually not to the
same extent due to the speed of the aircraft. However I recall flying from
the South Carolina coast to Pensacola, FL, and steering 270 degrees the entire
way. There are also precision air navigational aids that can
instantly display ground speed and track, not much comparable for subs in
civilian application as far as I know.
I'm eager to see what's available or can be developed in this
area for small subs without being outrageously expensive or large.
When I get to the point of actual tests, I'll build data
charts on water speed for various rpm for a given configuration. That's a
long way off.
Cheers,
Jim
In a message dated 10/31/2010 7:08:33 P.M. Central Daylight Time,
dbartsch2236@hotmail.com writes:
Alan, |