[PSUBS-MAILIST] Forward Facing Scanning Sonar

[k6fee via Personal_Submersibles]

A friend of mine has a forward looking sonar and it's great for spotting rises in the bottom. However his boat isn't a sub, so no idea of what pressure the transducer can take.
Keith T.


Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: via Personal_Submersibles <personal_submersibles at psubs.org> Date: 2/24/18  6:38 PM  (GMT-08:00) To: personal_submersibles at psubs.org Subject: Re: [PSUBS-MAILIST] Forward Facing Scanning Sonar 
Scanning sonar is the set of eyes you don't have. It's invaluable for anything beyond just dawdling around having a look in the light pool. Unfortunately, 10-15k won't touch what Pisces carries. The acoustic altimeter alone is getting on for 5k. Ouch.
Vance






-----Original Message-----

From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>

To: personal_submersibles <personal_submersibles at psubs.org>

Sent: Sat, Feb 24, 2018 8:19 pm

Subject: [PSUBS-MAILIST] Forward Facing Scanning Sonar



Just wondering whether a forward facing scanning sonar is worth it.

I have been re-looking at them to see if there have been any recent

developments.

A couple that I have looked at that are for the rov market, are around

10-15k. I looked at a video showing a camera image with the scanner

screen image in the corner of the screen, & it looked unintelligible.

Am wondering if just a depth sounder mounted horizontally would do

just from the low visibility collision avoidance perspective. I could make a

small fibreglass plug to fit in a small through hull & mount a "shoot through

hull" depth sounder inside my hull. Did a quick analysis & a 2" diameter 

fibreglass plug 1/2" thick fitted over a 1" diameter hole would give me a 

15,000ft depth rating. Have talked with sonar people who have advised not 

to go more than 1/2" thick with the fibreglass I am shooting through & to 

leave no air gaps between the transducer & fibreglass. 

I did pursue the idea of adapting the cheaper Simrad Forward Scan for boats

but after getting little information from manufacturers & reps, dropped the

idea. They also said they didn't think it would work with a shoot through hull

& had no idea of it's depth rating.

Has anyone had any experience with forward scan or a forward mounted

depth sounder. Or from your submarine experience do you think this is

not really necessary.

Cheers Alan

  



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