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Wow thats awesome results David,
& thats the unit that you recently discovered, that
saved you a lot of assembly work I pressume.
You wrote > better hear the sent
massages
Did you have Franks model assisting you?
Alan
----- Original Message -----
Sent: Sunday, April 11, 2010 7:21
AM
Subject: [PSUBS-MAILIST] in-water testing
session completed
To all:
I have just returned
from an in-water testing session of the the two Ray Jefferson hailer based
broadband underwater voice communications systems and wish to report
our findings.
The testing session was done on
Lake Placid in the Chickasaw State Park some 14 miles West from Henderson. We
used two piers separated by 420 feet of fresh water that was slightly
shallower than first thought. The depth was about 15' at the deepest point and
was much shallower as it approached the two piers. At these piers it was about
5 to 8 feet deep.
No boat traffic was in the water nor
were there any fisherman. No swimmers were in the water and biological
acoustics were almost non existent. In short, little was present in the way of
ambient acoustical interference.
We were
easily able to talk to and from each unit and were fully understood by both.
We spoke nursery rhymes and other unpredictable messages so as to ensure we
actually could repeat the messages being sent. These messages
were repeated via small hand held talkie
talkies.
It should be noted that we had to
lean close to the enclosures in order to better hear the sent massages as at
this range, these were a bit faint. Had there been ANY extra distracting
noises, the full understanding of the received messages could have been a bit
confusing. I would say from this testing session that under these ideal
condition, this 420 feet is approaching if not already at the maximum two way
communications range of this type of system at least in this shallow depth of
water. We also made use of a morse code message using the keyed fog horn
feature and this does seem to have farther range but who wants to memorize
morse!
This system seems best suited for short
range casual sub to sub or sub to diver communications. If one is planning for
deeper dives than this range tested today, a primary communications system
should also be deployed with this system used as an alternate backup. There
was no need for us to test to the farther 1300 foot target range as I am
sure we would not have pulled this of under these
conditions.
The depths of 35 feet seems to be
an ideal test depth for salt water use as this depth is expected at this
coming convention.
A special thanks is
extended to both my sons Cameron and Paul as well as Kyle and Alec for
the use of these systems during today's testing session. These two system will
now be shipped to these new owners on Monday.
Good luck to all of you and I hope to see you God willing at the convention in
July.
David Bartsch
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