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Lets say you're fishing laydowns & under water brush trying to catch crappie down to around 40 feet on cumberland. Would you run 83 for 2 d along with down imaging if trying to stay off of whatever structure they're on a little way so as not to spook fish? Thanks
DI works best with boat movement because of the thin shape of the DI sound pulse ...
2d is suited for stationary boat control ...
And of course the 83kHz 2d Sonar cone shape (60°) is wider than the 200kHz Sonar cone shape (20°) ...
So your theory of using 83kHz 2d would indeed allow staying off the fish somewhat and still see the fish on the 2d Sonar view ...
The challenge is that the fish may be forward, aft, starboard, or port of the transducer and still show at the same place on the 2d Sonar view ...
Rickie
https://youtu.be/R4T0Tuv6RvY
Rickie
It would be a wider area, but a circle around the transducer still gives me a better idea in my mind of where fish could be positioned in a circle relative to the transducer . What beam angle would you run down imaging on if you were me running strictly 83 on 2 d. Also why use sensitivity setting on 83? Thanks Rickie.Quote:
Originally Posted by rnvinc
The DI beam is 45° at 800kHz and 75° at 455kHz ...
800kHz will be more detailed (if you think the 45° thin slice DI beam will “see” your targets) ...
A good rule of thumb for 2d sensitivity is raise sensitivity until the screen is too cluttered for your liking - then back it off a click or 2 ...
Rickie
Thank you sir. :ThumbsUp