What is the best frequency, medium or high, for an Airmar B 175 through-hull chirp transducer? It will be paired with a Simrad NSS 12 Evo 3. And I do all sorts of fishing, but the sonar is most important to me for reefs or bottom fishing, out to the ledge or maybe 400’.
Among the knowledgeable people I’ve talked to, they are split. Some favor the medium b/c of wider cone and more depth penetration. The argument for the high frequency is that the more narrow cone would give more bottom detail.
Have seen wonderful images on a friend’s B275C-LH-W. But that is out of my league.
https://www.lowrance.com/articles-and-guides/transducer-information/
Scroll to the bottom of that page, maybe that can clarify or get you closer to what you’re looking for.
Fishing Nerd
“skilled labor isn’t cheap, cheap labor isn’t skilled”
If I’m looking for new live bottom, I like to use the High Chirp. Then enhance the range by 2x or 3x, and then turn up the gain and play around with it until there is a little bit of fuzz but you can still see the 2nd echo. Turning up the gain will also help you see the thermocline.
You can also do a split screen with the full range, then make the 2nd screen with 2x or 3x the range. That way if you spot something on the full range screen, you can get dialed in on the 2nd screen.
Still not ruling out the Wide angle though some Airmar people say it sacrifices bottom detail, which is the primary aim.
Clem, what ducer are you using?
quote:
Originally posted by Ona Mission
Still not ruling out the Wide angle though some Airmar people say it sacrifices bottom detail, which is the primary aim.
Clem, what ducer are you using?
Hey Ona Mission,
sorry for the late reply, the boat I fish on has a B265LH Chirp Transducer on it.