[PSUBS-MAILIST] Personal_Submersibles Digest, Vol 50, Issue 19

Pete Niedermayr via Personal_Submersibles personal_submersibles at psubs.org
Fri Aug 11 17:09:41 EDT 2017


freepetesub at yahoo.com
--------------------------------------------
On Thu, 8/10/17, Gregory Snyder via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] Personal_Submersibles Digest, Vol 50, Issue 19
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Date: Thursday, August 10, 2017, 6:39 PM
 
 Pete!
 Are you in Minnesota?
 Me too. 
 Minnetrista and Duluth. 
 
 > On Aug 10, 2017, at 6:24 PM, Pete
 Niedermayr via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 > 
 > Melbourne ? Try Minnesota.
 >
 --------------------------------------------
 > On Wed, 8/9/17, Alan via
 Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 > 
 > Subject: Re: [PSUBS-MAILIST]
 Personal_Submersibles Digest, Vol 50, Issue 19
 > To: "Personal Submersibles General
 Discussion" <personal_submersibles at psubs.org>
 > Date: Wednesday, August 9, 2017,
 8:09 PM
 > 
 > Hi
 > Steve,ideally a normal air
 > conditioner would be better for
 cooling, but you have to get
 > rid of it's heat somehow.
 > I am not sure how the expensive
 submersibles do it! Maybe
 > there is a
 > through hull to an external heat
 exchanger. They are also
 > noisy, bulky & I could bewrong
 but I believe
 > G.L. have issues with the gas they
 use! If the peltier was
 > 25% asefficient as a
 > compression unit, & needed 4 x
 the power, then that
 > might mean havinganother battery
 to
 > drive it. The bulk & expense
 of the battery may even out
 > the cost& size comparison
 > of the two options. This would be
 interesting to
 > research!I
 > saw a couple of articles that said
 the Peltier was up there
 > in efficiency with resistive
 heating. They
 > are used in climate control
 modules in both their heating
 > &cooling
 > functions, & I like this
 option for a submersible where
 > you can go from one extreme of
 temperature
 > to another! ( like
 Melbourne)Cheers Alanp.s. my daughter loves
 > it in Melbourne she has been there
 4 years now!
 > 
 > 
 > 
 > Sent
 > from my iPad
 > On
 > 10/08/2017, at 12:14 PM, Stephen
 Fordyce via
 > Personal_Submersibles <personal_submersibles at psubs.org>
 > wrote:
 > 
 > Hi Alan,Resistive heating being
 > about as close as you can get to
 100%, I would be sceptical
 > about that. I've experimented with
 Peltier modules for
 > gas cooling and they were quite
 disappointing in
 > performance, although wonderfully
 simple in
 > operation.
 > Cheers,Steve
 > On 10 Aug 2017 8:33 am,
 > "Alan via Personal_Submersibles"
 <personal_submersibles at psubs.org>
 > wrote:
 > Just did some Googling on
 > the Peltier as a heater.In
 > an experiment I saw it was more
 efficient than resistive
 > heating!This
 > depends to an extent on the
 ambient heat
 > differential. I
 > would imagine you would need to
 attach them to the hull
 > & surround themwith
 > an insulating material to stop the
 metal of the hull
 > radiating backthe
 > cold or heat produced, & force
 it to transfer it all to
 > the water.Another
 > bunny trail to investigate.Cheers
 > Alan
 > 
 > Sent from my
 > iPad
 > On 10/08/2017, at 9:18 AM,
 > Alan via Personal_Submersibles
 <personal_submersibles at psubs.
 > org> wrote:
 > 
 > Mike,the peltier is only
 > 1/4 to 1/3 as efficient as a
 compressor system, but
 > Cliff& I have very little
 spare room. They
 > serve as heaters by reversing
 polarity.I am not
 > sure of their efficiency as
 heaters compared with resistive
 > coils;probably poor!  Cliff
 would have to cut a
 > hole in his fibreglass outer &
 dig backthe
 > syntactic foam to the pressure
 hull to get cooling on the
 > reverse side ofthe peltier or
 compressor air
 > conditioning unit. Could look sexy
 if he put
 > someshark gills in it for water
 > ingress.Cliff didn't have a cover
 on the
 > dome, & that would let a lot
 of heat in.We
 > had a wet towel on Snoopy last
 time at
 > Islamorada.Have heard that people
 like Nuytco use
 > a shore based air conditioner to
 coolthe sub down
 > prior to a dive; but I don't know
 how long that benefit
 > wouldlast being towed out that
 > distance.Cheers Alan 
 > 
 > Sent from my
 > iPad
 > On 10/08/2017, at 6:25
 > AM, peaceroom via
 Personal_Submersibles <personal_submersibles at psubs.
 > org> wrote:
 > 
 > 
 > 
 > Reference,summer submarine
 cooling. A scaled down
 > version of the small cooler with
 ice and DC fan, similar to
 > the one in Sportys, aviation
 supplies is what a lot of
 > planes use. Just an inexpensive
 idea. Peltier coolers
 > provide very little cooling versus
 DC current used. Mike
 > Patterson 
 > 
 > 
 > Sent from my Samsung
 > device
 > 
 > --------
 > Original message --------
 > From: via
 > Personal_Submersibles <personal_submersibles at psubs.
 > org> 
 > Date: 8/9/17  11:46 AM 
 > (GMT-05:00) 
 > To: personal_submersibles at psubs.
 > org 
 > Subject: Personal_Submersibles
 > Digest, Vol 50, Issue 19 
 > 
 > Send Personal_Submersibles mailing
 list
 > submissions to
 >    personal_submersibles at psubs.
 > org
 > 
 > To subscribe or
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 > 'help' to
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 > 
 > When
 > replying, please edit your Subject
 line so it is more
 > specific
 > than "Re: Contents of
 > Personal_Submersibles digest..."
 > 
 > 
 > Today's Topics:
 > 
 >    1. Re: Islamorada
 Trip
 > Report...
 >       (Cliff Redus
 via
 > Personal_Submersibles)
 >    2. Re:
 > Islamorada Trip Report...
 >       (james
 > cottrell via
 Personal_Submersibles)
 > 
 > 
 > ------------------------------
 > ------------------------------
 ----------
 > 
 > Message: 1
 > Date: Wed, 9 Aug 2017 08:03:07
 -0500
 > From: Cliff Redus via
 Personal_Submersibles
 >    <personal_submersibles at psubs.
 > org>
 > To: Personal Submersibles
 > General Discussion
 >    <personal_submersibles at psubs.
 > org>
 > Subject: Re: [PSUBS-MAILIST]
 > Islamorada Trip Report...
 > Message-ID:
 >   
 <CAK4DN4DuhY87_6v+19RNb-
 > 6x2d9fKdaCW1uND2psz=ncVoQ9cg@
 mail.gmail.com>
 > Content-Type: text/plain;
 > charset="utf-8"
 > 
 > Footage from my sub on the trip is
 limited due
 > to condensation on
 > viewport.  I used Dove
 > soap on the viewport interior
 prior to taking off
 > but because of the humidity ,
 temperature and
 > duration of the dive, this
 > treatment did not
 > last and I did not have more soap
 on board.  The other
 > issue is I only had two hand
 towels on board
 > and these became soaked with
 > sweat.  As
 > such, they were not good for
 cleaning the condensation off
 > after
 > the two hour tow to the dive site.
 
 > Action items:  Have small
 bottle of
 > Dove
 > soap on board and more towels for
 future long duration
 > dives.
 > 
 > Yes, I have been
 > reading up on peltier
 coolers.  I have quite a bit of
 > battery capacity so this could
 work. 
 > Unfortunately, mounting on hull
 won't
 > work for me as I have syntactic
 foam under the
 > FRP shell over the hull so I
 > don't have
 > a cool surface to mount on. 
 I do have a pair of plugged
 > off
 > ports on the bottom of the boat
 that
 > would give me access to cooling
 water
 > source
 > if I installed a small pump on
 this circuit.  Pushing this
 > water
 > through a small fin-fan cooler
 like
 > you would see on water cooled
 > motorcycle
 > would help with the temperature
 some what but not
 > humidity.   At
 > Islamorada, the average
 > water temperature at the time of
 the dive was about
 > 87F so this would not have helped
 all that
 > much.  A small DC AC system
 that
 > controlled
 > both temperature and humidity
 would be better.
 > 
 > On the thruster pneumatic
 > pressure compensation, I was very
 happy with how
 > this worked.  I have all four
 of my thrusters
 > connected to 1/4" SS tubing
 > that is
 > manifold into a single pressure
 reducing/relieving
 > regulator
 > (thanks Hugh)  under the
 cover
 > just aft of the pilot. I was not
 sure if a
 > single regulator would work or if
 I would need
 > one for each thruster but it
 > looks like one
 > was adequate.  I have had two
 deep dives with the
 > arrangement, one to 155 ft and one
 to 100 ft
 > and have had no issues with
 > water in the
 > thrusters.
 > 
 > Best Regards
 > 
 > Cliff
 > 
 > On Tue, Aug 8, 2017 at 10:50 PM,
 Alan via
 > Personal_Submersibles <
 > personal_submersibles at psubs.
 > org> wrote:
 > 
 >> 
 > Thanks Cliff,
 >> I presume you shot some
 > footage from your sub & this
 is the entr?e!
 >> Nice & clear, you must
 have been
 > pretty happy down there!
 >> After you
 > mentioned air conditioning, I
 looked into peltier elements
 > &
 >> air conditioning units. The
 > peltier conditioners have only 25%
 the
 >> 
 > efficiency
 >> of a normal compression
 > cycle system, but are really small
 & by reversing
 >> the polarity can act as
 heaters. A few of
 > those peltier elements stuck to
 >> the
 > hull
 >> with air channelled past them
 > might be the way to go! Not sure
 what
 >> 
 > batteries you
 >> are using, but the new
 > battery technologies on the way
 will make energy
 >> expenditure less of an issue!
 >> Do you have all 4 motors
 exhausting
 > through one regulator? Couldn't
 see
 >> 
 > any
 >> air coming out of the motor
 seals
 > so the pressure isn't building up
 too
 >> much
 >> when
 > exhausting.
 >> Cheers Alan
 >> 
 >> 
 >> 
 >> Sent from my iPad
 >> 
 >> On 9/08/2017, at 8:25
 > AM, Cliff Redus via
 Personal_Submersibles <
 >> personal_submersibles at psubs.
 > org> wrote:
 >> 
 >> 
 > Added two quick and dirty Youtube
 videos from 2017 Psubs
 > Regatta.  The
 >> first is the 100 ft dive
 > 5.3 miles offshore on Aug 3
 >>
 https://www.youtube.com/watch?
 > v=sHqL49V0lMw and the second is a
 night
 >> dive in front of Doug's
 house  https://www.youtube.com/watch?
 > v=KDBw1ZOdKaI.
 >> Alec is working on a
 > more comprehensive video of the
 Regatta.
 >> 
 >> Regards
 >> 
 >> Cliff
 >> 
 >> On Mon, Aug 7, 2017
 > at 4:53 PM, Douglas Suhr via
 Personal_Submersibles <
 >> personal_submersibles at psubs.
 > org> wrote:
 >> 
 >>> Greetings PSUBS group,
 Douglas Suhr
 > here to share my take on the
 4-day
 >>> 
 > sub operation we just completed in
 Islamorada, FL (July
 > 31st, August
 >>> 1-3).
 >>> 
 >>> Wow, what a
 > whirlwind! So July 31st was really
 an arrival / setup day
 >>> with August 1-3 being true
 operational
 > days. Though it was unfortunate
 >>> 
 > that Alec wasn't able to make it
 with Shackleton, we had
 > our hands
 >>> full with Cliff's
 > R-300. Without Shackleton, we also
 had enough time
 >>> to get Snoopy set up and
 lowered into
 > the canal for some basic diving.
 >>> 
 >>> List of Crew: Dan Lance,
 Steve
 > McQueen, Cliff Redus, Rick
 Maxwell,
 >>> 
 > River Dolfi, Mike Patterson, Doug,
 Sarah, Douglas Suhr.
 >>> 
 >>> This was my
 > first time meeting Dan Lance, a
 (retired) saturation
 > diver
 >>> and commercial welder.
 What a
 > pleasure to have him join us on
 this
 >>> operation. Dan is modest,
 but most
 > willing to share his knowledge
 and
 >>> 
 > extensive experience with a newbie
 like me. So pleased to
 > have chatted
 >>> with him in the Keys.
 > During the towing of the R-300,
 Dan manned the
 >>> tow line and helped with
 comms.
 >>> 
 >>> Steve McQueen
 > and River Dolfi did awesome jobs
 as our frog men.
 >>> Filming, attaching /
 detaching davit
 > and tow lines, etc. they were
 >>> both
 > in and out of the water quite a
 bit (especially Steve). I
 > think
 >>> River took a little jelly
 > sting for the team. What
 troopers!
 >>> 
 >>> Cliff and his
 > assistant Rick are such a joy be
 around. Rick is one of
 >>> the friendliest people
 you'll ever
 > meet (and even brought a gift for
 >>> 
 > the group: a watermelon, straight
 from Texas!). Cliff is
 > always
 >>> willing to share his
 > expertise (and sub, too) with
 anyone who'd like
 >>> to learn more. I know that
 between Dan
 > Lance and Cliff, I learned more
 >>> 
 > than I can remember last week.
 >>> 
 >>> Mike Patterson, mom, dad
 and myself
 > were all just providing whatever
 >>> 
 > kind of "troop support" we could
 to Cliff and the
 > R-300.
 >>> 
 >>> 
 > River, Steve and Myself got in
 some dive time on Snoopy in
 > the canal
 >>> (which was great), but I
 > think the biggest accomplishment
 was getting
 >>> the R-300 out a ways into
 the
 > ocean.
 >>> 
 >>> Our
 > Boston Whaler (a 25' boat with a
 single 250hp Yamaha)
 > was able to
 >>> tow the R-300 out about
 > 5 miles into the ocean (at about
 4mph). We
 >>> were in radio
 communication with Cliff
 > most of the time, though we did
 >>> 
 > suffer a few intermittent losses
 in comms. When we got to a
 > spot about
 >>> 100 feet deep, we
 > started to slow down a bit and at
 that point the tow
 >>> line hook (an admittedly
 cheap thing)
 > let loose(!) so we decided that
 >>> we
 > had reached our dive location. We
 switched from marine radio
 > to OTS
 >>> and Cliff started down.
 > Visibility was supurb! As Cliff
 neared the
 >>> bottom at 100 ? 110 feet,
 he was still
 > quite visible from the Whaler!
 >>> His
 > 18 foot long R-300 looked to be
 about 3 inches long, but wow
 > did
 >>> it ever stand out from the
 rest
 > of the sandy bottom. Cliff spent
 about
 >>> an hour "flying" his sub,
 > surfacing, diving and maneuvering
 about,
 >>> testing systems and
 observing the
 > ocean around him. By the time
 Cliff
 >>> 
 > surfaced and we towed back to port
 Antigua, elapsed time
 > stood at 4.5
 >>> / 5 hours (estimate).
 > Cliff said that he stayed cool by
 the water
 >>> flowing over the sub's
 dome hatch
 > while in tow. Upon returning I
 think
 >>> we were all ready to take
 a break, but
 > everyone felt great
 >>> accomplishment
 > with the mission.
 >>> 
 >>> A couple of lessons I took
 away from
 > the tow out: We need better tow
 >>> 
 > equipment (better line, hardware
 and maybe a quick release).
 > Our boat
 >>> REALLY needs a GPS (still
 > don't have one). Towing into waves
 isn't so
 >>> much a problem, but when
 towing with
 > the waves, our tow line needs to
 >>> be
 > measured so as to sustain the
 proper distance between tow
 > vessel
 >>> and sub (otherwise the
 sub
 > and boat are constantly slacking
 and then
 >>> jerking, stressing the tow
 line and
 > making it difficult for boat and
 >>> 
 > sub to track straight).
 >>> 
 >>> The devotion of our crew
 was amazing,
 > even in the heat and the waves
 >>> 
 > everyone did their jobs. Managing
 even a small sub operation
 > like this
 >>> is more work / effort
 > than meets the eye, that's for
 sure. At dinner,
 >>> one of the main
 discussions revolved
 > around a support vessel that can
 >>> 
 > carry a sub or two on board,
 eliminating the slow, time
 > consuming tow
 >>> out to an ocean dive
 > site. Dan Lance shared details on
 his support
 >>> vessel project, which is
 no doubt
 > going to be a dream in terms of
 >>> 
 > logistics. Hopefully when said
 vessel is ready to sail, Dan
 > will lend
 >>> its services to host a
 > diving event! ~ Douglas S.
 >>> 
 >>>
 ______________________________
 > _________________
 >>> 
 > Personal_Submersibles mailing
 list
 >>> 
 > Personal_Submersibles at psubs.
 > org
 >>> http://www.psubs.org/mailman/
 > listinfo.cgi/personal_
 submersibles
 >>> 
 >> 
 >>
 ______________________________
 > _________________
 >> Personal_Submersibles
 > mailing list
 >> Personal_Submersibles at psubs.
 > org
 >> http://www.psubs.org/mailman/
 > listinfo.cgi/personal_
 submersibles
 >> 
 >> 
 >> 
 > ______________________________
 _________________
 >> Personal_Submersibles mailing
 list
 >> Personal_Submersibles at psubs.
 > org
 >> http://www.psubs.org/mailman/
 > listinfo.cgi/personal_
 submersibles
 >> 
 >> 
 > -------------- next part
 --------------
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 scrubbed...
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 > pipermail/personal_
 submersibles/attachments/
 > 20170809/ea2b1476/attachment-
 0001.html>
 > 
 > ------------------------------
 > 
 > Message: 2
 > Date: Wed, 9 Aug 2017 15:46:22
 +0000 (UTC)
 > From: james cottrell via
 > Personal_Submersibles
 >    <personal_submersibles at psubs.
 > org>
 > To: Personal Submersibles
 > General Discussion
 >    <personal_submersibles at psubs.
 > org>
 > Subject: Re: [PSUBS-MAILIST]
 > Islamorada Trip Report...
 > Message-ID:
 <1907666847.421009.
 > 1502293582178 at mail.yahoo.com>
 > Content-Type: text/plain;
 > charset="utf-8"
 > 
 > Hi Cliff,
 > Congrats on your
 > dives. Sub really looks great in
 those videos.
 > With regards to an AC solution,
 one low tech
 > method would be to blow air across
 ice in a small cooler.
 > Water ice can be super cooled with
 Dry Ice the night before.
 > Dry ice is about - 100 F and water
 ice cooled to this
 > temperature should stay cold for
 quite some time.
 > Greg C      From:
 Cliff Redus via
 > Personal_Submersibles <personal_submersibles at psubs.
 > org>
 >  To: Personal Submersibles
 > General Discussion <personal_submersibles at psubs.
 > org> 
 >  Sent: Wednesday, August 9,
 > 2017 9:05 AM
 >  Subject: Re:
 [PSUBS-MAILIST]
 > Islamorada Trip Report...
 >    
 > Footage from my sub on the trip is
 limited due
 > to condensation on viewport.? I
 used Dove soap on the
 > viewport interior?prior to taking
 off but because of the
 > humidity , temperature and
 duration of the dive, this
 > treatment did not last and I did
 not have more soap on
 > board.? The other issue is I only
 had two hand towels on
 > board and these became soaked with
 sweat.? As such, they
 > were not good for cleaning the
 condensation off?after the
 > two hour tow to the dive site.?
 Action items:? Have small
 > bottle of Dove soap on board and
 more towels for future long
 > duration dives.? 
 > Yes, I have been reading
 > up on peltier coolers.? I have
 quite a bit of battery
 > capacity so this could work.?
 Unfortunately, mounting on
 > hull won't work for me as I have
 syntactic foam under
 > the FRP shell over the hull so I
 don't have a cool
 > surface to mount on.? I do have a
 pair of plugged off ports
 > on the bottom of the boat that
 would give me access to
 > cooling water source if I
 installed a small pump on this
 > circuit.? Pushing this water
 through a small fin-fan cooler
 > like you would see on?water cooled
 motorcycle would help
 > with the temperature some what but
 not?humidity.? ?At
 > Islamorada, the average water
 temperature at the time of the
 > dive was about 87F so this would
 not have helped all that
 > much.? A small DC AC system that
 controlled both temperature
 > and humidity would be better.
 > On the
 > thruster pneumatic pressure
 compensation, I was very happy
 > with how this worked.? I have all
 four of my thrusters
 > connected to 1/4" SS tubing that
 is manifold into a
 > single pressure reducing/relieving
 regulator (thanks Hugh)
 > ?under the cover just aft of the
 pilot.?I was not sure if a
 > single regulator would work or if
 I would need one for each
 > thruster but it looks like one was
 adequate.? I have had two
 > deep dives with the arrangement,
 one to 155 ft and one to
 > 100 ft and have had no issues with
 water in the
 > thrusters.
 > Best Regards
 > Cliff
 > On Tue, Aug 8, 2017 at
 > 10:50 PM, Alan via
 Personal_Submersibles <personal_submersibles at psubs.
 > org> wrote:
 > 
 > Thanks
 > Cliff,I presume you shot some
 footage from your sub &
 > this is the entr?e!Nice &
 clear, you must have been
 > pretty happy down there!After you
 mentioned air
 > conditioning, I looked into
 peltier elements &air
 > conditioning units. The peltier
 conditioners have only 25%
 > the efficiency?of a normal
 compression cycle system, but are
 > really small & by reversingthe
 polarity can act as
 > heaters. A few of those peltier
 elements stuck to the
 > hull?with air channelled past them
 might be the way to go!
 > Not sure what batteries youare
 using, but the new battery
 > technologies on the way will make
 energyexpenditure less of
 > an issue!Do you have all 4 motors
 exhausting through one
 > regulator? Couldn't see any?air
 coming out of the motor
 > seals so the pressure isn't
 building up too muchwhen
 > exhausting.Cheers Alan
 > 
 > 
 > Sent from my iPad
 > On 9/08/2017,
 > at 8:25 AM, Cliff Redus via
 Personal_Submersibles
 > <personal_submersibles at psubs.
 org> wrote:
 > 
 > 
 > Added two
 > quick and dirty Youtube videos
 from 2017 Psubs Regatta.? The
 > first is the 100 ft dive 5.3 miles
 offshore on Aug 3??https://www.youtube.com/
 > watch?v=sHqL49V0lMw?and the second
 is a night dive in front
 > of Doug's
 house??https://www.youtube.
 > com/watch?v=KDBw1ZOdKaI.? Alec is
 working on a more
 > comprehensive video of the
 Regatta.
 > Regards
 > Cliff
 > On Mon, Aug 7, 2017 at 4:53 PM,
 Douglas Suhr
 > via Personal_Submersibles <personal_submersibles at psubs.
 > org> wrote:
 > 
 > Greetings
 > PSUBS group, Douglas Suhr here to
 share my take on the
 > 4-day
 > sub operation we just completed
 in
 > Islamorada, FL (July 31st, August
 > 1-3).
 > 
 > Wow, what a whirlwind! So July
 > 31st was really an arrival / setup
 day
 > with
 > August 1-3 being true operational
 days. Though it was
 > unfortunate
 > that Alec wasn't able to
 > make it with Shackleton, we had
 our hands
 > full with Cliff's R-300. Without
 > Shackleton, we also had enough
 time
 > to get
 > Snoopy set up and lowered into the
 canal for some basic
 > diving.
 > 
 > List of Crew: Dan
 > Lance, Steve McQueen, Cliff Redus,
 Rick Maxwell,
 > River Dolfi, Mike Patterson, Doug,
 Sarah,
 > Douglas Suhr.
 > 
 > This was my
 > first time meeting Dan Lance, a
 (retired) saturation
 > diver
 > and commercial welder. What a
 pleasure
 > to have him join us on this
 > operation. Dan
 > is modest, but most willing to
 share his knowledge and
 > extensive experience with a newbie
 like me. So
 > pleased to have chatted
 > with him in the
 > Keys. During the towing of the
 R-300, Dan manned the
 > tow line and helped with comms.
 > 
 > Steve McQueen and River Dolfi
 > did awesome jobs as our frog men.
 > Filming,
 > attaching / detaching davit and
 tow lines, etc. they were
 > both in and out of the water quite
 a bit
 > (especially Steve). I think
 > River took a
 > little jelly sting for the team.
 What troopers!
 > 
 > Cliff and his assistant Rick
 > are such a joy be around. Rick is
 one of
 > the
 > friendliest people you'll ever
 meet (and even brought a
 > gift for
 > the group: a watermelon, straight
 > from Texas!). Cliff is always
 > willing to
 > share his expertise (and sub, too)
 with anyone who'd
 > like
 > to learn more. I know that between
 Dan
 > Lance and Cliff, I learned more
 > than I can
 > remember last week.
 > 
 > Mike
 > Patterson, mom, dad and myself
 were all just providing
 > whatever
 > kind of "troop support"
 > we could to Cliff and the R-300.
 > 
 > River, Steve and Myself got in
 some dive time
 > on Snoopy in the canal
 > (which was great),
 > but I think the biggest
 accomplishment was getting
 > the R-300 out a ways into the
 ocean.
 > 
 > Our Boston Whaler (a 25'
 > boat with a single 250hp Yamaha)
 was able to
 > tow the R-300 out about 5 miles
 into the ocean
 > (at about 4mph). We
 > were in radio
 > communication with Cliff most of
 the time, though we did
 > suffer a few intermittent losses
 in comms. When
 > we got to a spot about
 > 100 feet deep, we
 > started to slow down a bit and at
 that point the tow
 > line hook (an admittedly cheap
 thing) let
 > loose(!) so we decided that
 > we had reached
 > our dive location. We switched
 from marine radio to OTS
 > and Cliff started down. Visibility
 was supurb!
 > As Cliff neared the
 > bottom at 100 ? 110
 > feet, he was still quite visible
 from the Whaler!
 > His 18 foot long R-300 looked to
 be about 3
 > inches long, but wow did
 > it ever stand out
 > from the rest of the sandy bottom.
 Cliff spent about
 > an hour "flying" his sub,
 surfacing,
 > diving and maneuvering about,
 > testing
 > systems and observing the ocean
 around him. By the time
 > Cliff
 > surfaced and we towed back to
 port
 > Antigua, elapsed time stood at
 4.5
 > / 5 hours
 > (estimate). Cliff said that he
 stayed cool by the water
 > flowing over the sub's dome hatch
 while in
 > tow. Upon returning I think
 > we were all
 > ready to take a break, but
 everyone felt great
 > accomplishment with the mission.
 > 
 > A couple of lessons I took
 > away from the tow out: We need
 better tow
 > equipment (better line, hardware
 and maybe a
 > quick release). Our boat
 > REALLY needs a GPS
 > (still don't have one). Towing
 into waves isn't
 > so
 > much a problem, but when towing
 with the
 > waves, our tow line needs to
 > be measured so
 > as to sustain the proper distance
 between tow vessel
 > and sub (otherwise the sub and
 boat are
 > constantly slacking and then
 > jerking,
 > stressing the tow line and making
 it difficult for boat
 > and
 > sub to track straight).
 > 
 > The devotion of our crew was
 > amazing, even in the heat and the
 waves
 > everyone did their jobs. Managing
 even a small
 > sub operation like this
 > is more work /
 > effort than meets the eye, that's
 for sure. At
 > dinner,
 > one of the main discussions
 revolved
 > around a support vessel that can
 > carry a sub
 > or two on board, eliminating the
 slow, time consuming tow
 > out to an ocean dive site. Dan
 Lance shared
 > details on his support
 > vessel project, which
 > is no doubt going to be a dream in
 terms of
 > logistics. Hopefully when said
 vessel is ready
 > to sail, Dan will lend
 > its services to host
 > a diving event! ~ Douglas S.
 > 
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