Notices

Help with 1040xs sonar images at cruise

Old 09-10-2014, 06:50 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Mar 2011
Posts: 201
Default Help with 1040xs sonar images at cruise

I have a newly installed Garmin 1040xs and GCV-10 combined with a B75 transducer (Thanks, Gil). I've never had a thru-hull transducer. I get excellent images with traditional, down-vu, and side-vu at slower speeds, but the image deteriorates with speed. Attached are images at faster and slower speeds. The down-vu seems to do better than the CHIRP at higher speeds.

My question is, is the image I'm getting at faster speeds about what everyone else is seeing? I'd like to be able to look for underwater structure at cruising speed. Are there adjustments I can make to the sonar that would improve the image? If this is not as good as it should be, does the location of the thru-hull make much difference?
Attached Images     
rcm55 is offline  
Old 09-10-2014, 06:59 PM
  #2  
Senior Member
Thread Starter
 
Join Date: Mar 2011
Posts: 201
Default

Forgot I had this on the computer and thought I throw it in. The boat was sitting in the Marina and I captured this image. I didn't have an SD card in the machine - the best I could do was with my cell phone. I thought the detail of the fish was impressive.
Attached Images  
rcm55 is offline  
Old 09-10-2014, 07:09 PM
  #3  
Admirals Club Admiral's Club Member
 
Join Date: May 2011
Location: Louisiana and Morehead City N.C.
Posts: 11,116
Default

Only doing 26 mph you should get the bottom detail solid without those gaps. I have a garmin unit and can run 50 mph and still marks the bottom solid.But its a transom mount transducer. Seems like a thru hole should do even better. Just side note I see your voltage showing over 15 on your gps. I think that's kinda high. I thought it was suppose to be around 14 or a hair over that. Others might can chime in and know more about that.
captain28570 is offline  
Old 09-28-2014, 06:31 AM
  #4  
Senior Member
Thread Starter
 
Join Date: Mar 2011
Posts: 201
Default

Here are pictures of the mounting location of the transducer.
Attached Images  
rcm55 is offline  
Old 09-28-2014, 06:33 AM
  #5  
Senior Member
Thread Starter
 
Join Date: Mar 2011
Posts: 201
Default

pic
Attached Images  
rcm55 is offline  
Old 09-28-2014, 06:45 AM
  #6  
Senior Member
Thread Starter
 
Join Date: Mar 2011
Posts: 201
Default

Gil -

I have some better picture but couldn't load them here. I sent them to your email.

Thanks,
Rob

Last edited by rcm55; 09-28-2014 at 07:09 AM.
rcm55 is offline  
Old 09-28-2014, 07:14 AM
  #7  
Senior Member
 
Join Date: Apr 2014
Posts: 850
Default

Is your thru hull set up above the bottom
Paint layer? You want a very smooth transition from the hull to the face of the transducer. If anything, you'd want the transducer to protrude slightly from the boat bottom. If the face is recessed you'll get turbulent flow over the face.

What's upstream of the transducer face?
Hossharris is offline  
Old 09-28-2014, 08:45 AM
  #8  
Admirals Club Admiral's Club Member
THT sponsor
Marine Advertiser
 
Join Date: Oct 2009
Posts: 21,752
Default

Originally Posted by rcm55 View Post
Gil -

I have some better picture but couldn't load them here. I sent them to your email.

Thanks,
Rob
PM sent
semperfifishing is offline  
Old 09-28-2014, 09:15 AM
  #9  
THT Sponsor
THT sponsor
 
Join Date: Jan 2002
Location: BOEmarine.com
Posts: 17,516
Default

Your gcv is working very well. Can you take a pic of the b75 so we can see what is going on there. Almost looks like you painted around the edges and left the middle bare and it has growth.
yachtjim is offline  
Old 09-28-2014, 12:33 PM
  #10  
Senior Member
Thread Starter
 
Join Date: Mar 2011
Posts: 201
Default

Harris -

The transducer protrudes from the bottom with the flange (lack of a better term) the way I believe it was designed to do. It is not recessed.

There is nothing upstream of the transducer.


Jim -

The B75 is in both the pictures that would upload, granted the pictures aren't great. In the first picture it's in the center of the black circle on the hull. In the second it's just below the underwater light on the portside. I didn't install the transducer, but it was placed over the already-in-place bottom paint, then the area immediately around it was painted with what looks like additional bottom paint. There is no growth, the boat is stored on the trailer and has only been in the water a couple of times since it was installed.

Of note, there is what appears to be some residual adhesive on the face of the transducer. It looks like the residue that remains when you remove a sticker from something. I'm not sure that affects anything, but I've been hesitant to remove it.
rcm55 is offline  
Old 09-29-2014, 10:27 AM
  #11  
Admirals Club Admiral's Club Member
 
Join Date: Aug 2009
Posts: 11,657
Default

Originally Posted by rcm55 View Post

Of note, there is what appears to be some residual adhesive on the face of the transducer. It looks like the residue that remains when you remove a sticker from something. I'm not sure that affects anything, but I've been hesitant to remove it.
My transducer (b175) has that too, I'm not sure it's meant to come off? Reminds me of a super thin screen protector that electronics get shipped with.
VanW is offline  
Old 09-29-2014, 10:40 AM
  #12  
Admirals Club Admiral's Club Member
THT sponsor
Marine Advertiser
 
Join Date: Oct 2009
Posts: 21,752
Default

Originally Posted by VanW View Post
My transducer (b175) has that too, I'm not sure it's meant to come off? Reminds me of a super thin screen protector that electronics get shipped with.
Some just have a residue from this sticker..it's o.k to clean it off.


Last edited by semperfifishing; 09-29-2014 at 10:54 AM.
semperfifishing is offline  
Old 09-29-2014, 10:45 AM
  #13  
Admirals Club Admiral's Club Member
 
Join Date: Aug 2009
Posts: 11,657
Default

Mine had like a film under that it even went up onto the bronze part (although that seems to have came off on it's own), if there was nothing to protect the transducer face then I guess it's ok. It must be part of the transducer.
VanW is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread