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ContinuousWave: Small Boat Electrical
RAYMARINE A57D SONAR Installation Recommendations Conflict with Manufacturer's Installation
|Author||Topic: RAYMARINE A57D SONAR Installation Recommendations Conflict with Manufacturer's Installation|
posted 05-05-2012 03:03 PM ET (US)
[My boat's] Raymarine A57D [SONAR] works great when at slow speeds, but forget it when cruising. I can't see any [SONAR echoes] when going over 12-MPH. The AIRMAR transducer was mounted [by the boat manufacturer] on the Port side, even though AIRMAR says it should be on Starboard side. Boston Whaler says Raymarine recommends port side. Who is correct?
Can a through-hull transducer [be installed] next to the live well hole? Please suggest my options--very frustrated.
posted 05-05-2012 05:07 PM ET (US)
Check with the manufacturer of your boat for advice on the best location to install a through-hull transducer. What sort of boat are you talking about?
posted 05-05-2012 05:08 PM ET (US)
[This discussion was moved to SMALL BOAT ELECTRICAL.]
posted 05-05-2012 05:13 PM ET (US)
Loss of bottom echo from the SONAR when the boat transitions to plane can be due to several causes:
--the SONAR device settings are not compensating for the additional attenuation to the bottom and back due to increased loss from aerated water flowing under the transducer
--the transducer depth of immersion is not good, and too much aerated water is flowing past the transducer
--the transducer is mounted too far outboard from keel centerline on a v-bottom boat, and as the boat transitions to plane the transducer is coming out of the water.
Mention what boat you are asking about, and give details about the current mounting location. If the SONAR transducer was installed by the manufacturer, the location is probably correct. You may need to work with the controls of the SONAR to get better bottom echoes when at speed.
posted 05-06-2012 06:52 PM ET (US)
There is a general practice among manufacturers of SONAR devices to recommend that they be mounted on the Port side of the transom for boats with right-hand propellers, that is propellers that rotate clockwise when viewed from astern when the boat is being propelled forward. The reason for this are explained in an article I wrote on this topic. Here is a link to the article on this topic:
As mentioned, this article is written with Boston Whaler boats in mind. I suggest you read the article. You may find the discussion about Port-side and Starboard-side mounting to be of interest to you, inasmuch as this seems to be the focus of your inquiry.
However, all that said, I have successfully mounted SONAR transducers on both the Port side of the transom and the Starboard side of the transom of my Boston Whaler boat.
posted 05-06-2012 10:53 PM ET (US)
I have a Raymarine A65 unit that runs the same Airmar transducer, mounted on the Starboard side. I had to do a good deal of adjustment to get it to run at speed, although I do lose lock around 25 to 30-MPH. You need to make small adjustments to the height and angle using the bracket supplied with the transducer. It will take some doing but will work for you.
I am not aware of anyone who put a through hull on a Whaler hull SONAR seems to work fine with a transom mount transducer if set properly. It will take some tries; be patient. The shop only set it approximately at the factory, you get to do the final setup. Good luck.
posted 05-08-2012 12:51 PM ET (US)
Mine works fine on Outrage 17.
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