Shoot-Thru Transducer

Hi all,

Chasing some advice. 


I had a Elite-5 Chirp installed (had to go Elite 5 at the time due to dash space...) about a year ago.

Cant even get depth reading when doing over 10Knots, let alone a decent picture of the bottom.

My old hummingbird gear used a shoot-thru transducer, but when installing the lowrance kit the guys installed the standard transom-mount. I’ve read a bit about the Southwind SF hulls producing too much turbulent water to use transom mounted transducers. 


Sooo... has anyone had any experience with shoot-thru transducers with the Elite Chirp sounders. Are the Airmar ones the go?



Posts: 232

Date Joined: 28/07/11

 I have had both a P66 and a

Wed, 2018-04-18 08:13

 I have had both a P66 and a P79 connected my HDS. The P66 gave a better reading but in saying that I have never done any settings adjustments to the P79 as the HDS is now used as my GPS whereas with the P66 it was my sounder as well. But i remember when I first installed the P66 it was still better than the P79 without any adjustments.

Posts: 107

Date Joined: 08/05/09


Wed, 2018-04-18 09:11

I switched to a p79 on an older lowrance ( lms series) after struggling to get a decent picture above 10 knots 

- easy to fit , far better picture even at the speeds where the TM tranny could read. 


Lavs's picture

Posts: 104

Date Joined: 30/04/12

 Thanks for the replies. Did

Wed, 2018-04-18 17:03

 Thanks for the replies. Did you lose any functionality by going to the P79?  I understand they don’t do water temp (understandable being in the hull) but wondering whether downscan imaging would work?

z00m's picture

Posts: 1017

Date Joined: 10/05/14


Wed, 2018-04-18 18:36

  No downscan with the P79. P79 is 50/200khz only. Downscan uses the 455/850khz or similar from memory.

The elite isn't a HDS unit either.


Lavs's picture

Posts: 104

Date Joined: 30/04/12

Yeah thats what I thought.

Thu, 2018-04-19 08:57

Yeah thats what I thought. Anyep DSI is on 455/800 kHz frequency.  Need to see if I can find an in-hull that does both frequency ranges.

Re HDS - Thanks, yeh knew that must've confused with a new one Im looking at.

ranmar850's picture

Posts: 1851

Date Joined: 12/08/12

Have a look at this page

Thu, 2018-04-19 10:11

 This is the old Lowrance transducer selection page, now moved to the Simrad page. Plenty of info as a starting point.

just click on the green arrow to start

Lavs's picture

Posts: 104

Date Joined: 30/04/12

Thanks mate.

Thu, 2018-04-19 12:06

Thanks mate.