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Lasers - I don't know the answer to your question,
but . . .
Now that you mention it: one way of calibrating the
size of objects found u/w is to mount two lasers on your sub, one port the other
stbd. They must be absolutely parallel & a known distance
apart.
The dome in a sub, or a diving mask, as most
of us have experienced first hand, distorts the sense of size of u/w
objects. The lasers allow for a quick estimate of the sizes of u/w objects
by seeing where the laser light falls on the object (or off).
Great for wrecks, large corals or fans,
etc.
Rick in Vancouver
----- Original Message -----
Sent: Wednesday, October 28, 2009 6:18
PM
Subject: RE: [PSUBS-MAILIST] R300 Dive
3
This
is probably a dumb idea and for sure it would not work in water with low
visibility - but, assuming that you have very good visibility, very clear
water, what if you shot a laser directly up from your sub ? how bad does
a laser diffuse in water? It seems like you could do that and you might
be able to detect the light on the surface using binoculars. During the
day it would probably be difficult, but at night it might be
possible.
Brian
Comms and a pinger sound about right (sorry for
the pun!!). Redundant sure works. Lines are dead simple but can
be a hazard. I would have to assume you're staying within scuba limits
because of your backup divers?
It's amazing that what seems so logical on
paper is, in reality, a complete bust in the field.
Keep us informed about the OTS
items.
Ciao
Rick
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----- Original Message -----
Sent: Wednesday, October 28, 2009
4:23 AM
Subject: Re: [PSUBS-MAILIST] R300
Dive 3
Floats on
the line could work but I think that I am just going to jettison the
safety line and buoy. I have a pinger attached to the boat so
finding the boat should not be an issue. What I really need
on the boat is the underwater comms. Dan Lance put me on to some really
good equipment from OTS that I am looking at.
Cliff
From: Rick & Marcia
<empiricus@telus.net>
To:
personal_submersibles@psubs.org
Sent: Tuesday, October 27, 2009
9:15:32 PM
Subject: Re:
[PSUBS-MAILIST] R300 Dive 3
"Action items
before my next dive include, procedure changes so no more launches off non
concrete ramps and no more buoy lines for surface
maneuvering."
Hi,
Cliff - nice to see the progress on your sub. That is one beautiful
boat!!
I
have a thought about your lines. Since you're in really poor vis
would it be prudent to keep your locating line, but, keep it buoyed by
intermittent floats along the rope? This is a buoy system we use up
here that keeps lines off the bottom. Whether it would be practical
as far as your intakes are concerned is another matter, but, it may just
save your bacon.
Ciao
Rick
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