Post Reply 
 
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
[TG11] e127/ B744 can't see fish
08-30-19, 01:00 PM (This post was last modified: 09-23-19 03:55 PM by Chuck - Raymarine - Moderator.)
Post: #1
[TG11] e127/ B744 can't see fish
Hi,

I've had this unit installed on my boat for about 4 years. I've never been able to see fish unless they're big and right under the boat (albacore). I can see the bottom just fine, even at speed but after watching countless hours of video's and countless hours of trying to adjust everything, I never seem to have any luck. I've also just left everything on Auto and still no luck. I know there are fish there because my catch rate has been good. Once I adjust the sensitivity up high enough to see the downrigger [censored] (12 lbs at 55 feet) the screen is so cluttered up I wouldn't know a fish if I saw it. I'm expecting to see 5-30 lb salmon.

I operate in saltwater in the Pacific Northwest.

Can you provide any clues as to what is wrong?

Boat is a Shamrock Mackinaw 270 straight shaft. Transducer is mounted upstream of the shaft and has a high speed fairing block.
Find all posts by this user
Quote this message in a reply
09-09-19, 02:08 AM (This post was last modified: 09-23-19 03:55 PM by Chuck - Raymarine - Moderator.)
Post: #2
RE: [TG11] e127/ B744 can't see fish
Hello Captain Starbucks,

Since you don't seem to have had any answers to your question, I'll see if I can help (I'm in Australia so don't know the boat/location.)

For a sounder to perform well it needs a good 'signal-to-noise ratio', that is a loud echo signal relative to the background noise level. Poor performance results when the signal is weak or the background noise is strong (loud.)

I've put a lot of background info and some diagnostic test information on this page. I'd suggest having a read through this, taking some diagnostic images as I describe there, and then posting them back here so that I can have a look and see whether you have weak signal, high noise or a combination of the two. Then we'll be able to look at how to tackle the problem.

Tom

Raymarine since 1999.
Interests: Diagnosis of problems in sonar/fishfinders, NMEA2000, ethernet comms, autopilots, thermal cameras
Location: Sydney, Australia.

Please don't PM me asking for direct support, please ask a public question instead so that others can see the question and answer. Forum posts will always be answered before PM requests.
Visit this user's website Find all posts by this user
Quote this message in a reply
09-23-19, 12:39 PM (This post was last modified: 09-23-19 03:55 PM by Chuck - Raymarine - Moderator.)
Post: #3
RE: [TG11] e127/ B744 can't see fish
Hi Tom,

Thanks for the reply. I didn't have my notifications turned on so didn't see your response.

Anyway, I discovered the 'factory default' setting and pressed it. Now I can see everything and am actually quite impressed with the sonar. I'm not sure what the previous owner did to it but I'm happy now!

Thanks again.

Rob
Find all posts by this user
Quote this message in a reply
09-24-19, 12:49 AM
Post: #4
RE: [TG11] e127/ B744 can't see fish
Good to hear! Happy fishing.

Tom

Raymarine since 1999.
Interests: Diagnosis of problems in sonar/fishfinders, NMEA2000, ethernet comms, autopilots, thermal cameras
Location: Sydney, Australia.

Please don't PM me asking for direct support, please ask a public question instead so that others can see the question and answer. Forum posts will always be answered before PM requests.
Visit this user's website Find all posts by this user
Quote this message in a reply
Post Reply 


Forum Jump:


User(s) browsing this thread: 2 Guest(s)

Contact Us