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[TG] [TG11] Fishfinder tutorial
08-11-19, 12:10 AM (This post was last modified: 08-21-19 07:56 AM by Chuck - Raymarine - Moderator.)
Post: #1
[TG11] Fishfinder tutorial
I think there used to be a video tutorial on getting the most from your Raymarine Fishfinder (CP350,CP450?). It explained about setting manual gain, TVG etc
I think it was for Lighthouse 2 and the guy that made the tutorial could have been from Sydney, Australia. He may have been a moderator.
I think it was on the "old" forum and may have been a FAQ.
Does anyone know the details where (if available) it is located?
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08-23-19, 02:37 AM
Post: #2
RE: [TG11] Fishfinder tutorial
Hello Bernie,

I don't know if there's another video, but I recorded some video for just such a tutorial here in Sydney. I don't remember ever releasing it though (I'm no screen icon, and the home-made cinematography from my mate holding a camera on a 6m boat 20nm out at Brown's Mountain, rolling beam-on to the swell, with 15 knots of wind noise and a chop slapping against the aluminium hull, was probably not as good as it sounds.) The horizon in the background would have made you sick watching it anyway, and I suspect we deleted the raw video.

Here's a 2-page quick guide that I made at about the same time though from the same info - have a read through this and let me know what questions come up. It runs through my preferred manual gain process for CP300/CP450C (for newer sounders, don't use manual: Auto does a much better job than any mere mortal can in Manual.)

Tom


Attached File(s)
.pdf  Raymarine_sounder_quick_reference-201407TG.pdf (Size: 423.33 KB / Downloads: 233)

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

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08-23-19, 03:41 AM (This post was last modified: 08-23-19 07:41 AM by Chuck - Raymarine - Moderator.)
Post: #3
RE: [TG11] Fishfinder tutorial
Thanks Tom
That doesn't sound like the one I remember, though its a good while ago and perhaps dementia is further advanced than i remember.
The quick guide will do the job anyway.
The reason is there is starting to be come conjecture as to chirp "scaring" fish. Certainly a couple of the mackerel pros up here are certain it scares off bait in shallow water. Me, I am not so sure, but want to be armed with all I can to test it out.
Then again, like all fishermen, the first thing you MUST do is find a reason you don't catch fish. If you have gadgets its a great fall back excuse. I obviously need more and better, improved (expensive) gadgets.....
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08-25-19, 11:53 PM
Post: #4
RE: [TG11] Fishfinder tutorial
Some of the pros I've spoken to have said the opposite, that monotonic (non-Chirp) sounders are more likely to scare fish than Chirp ones. A traditional monotonic sounder will make a sounder that is short and sharp and is something certainly that a person would recognise as being definitely artificial, whereas a chirp sounder's ping will be longer in duration but will change both in volume and frequency throughout the ping and would therefore likely sound more natural or biological to a human (the word Chirp long-predates fishfinders and is an analogy to a bird's call.) I've no idea what would scare a fish however.

Rather than changing technology, the simplest thing you could do to reduce a possible effect there would be to reduce power output, but on CP450C you can also use non-Chirp mode as well (50kHz, 200kHz are non-Chirp equivalents of Low Chirp and High Chirp.) Personally I wouldn't turn off Chirp, but you could certainly experiment with the effect on bait.

Regards,
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.
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