Depth finder??

[offdtop]

Does SI work at running speeds this is the only fish finder i will have in the boat. So am i wasteing money and should by 2 or 1 900 - 1100 series?

Si is only good at trolling speeds, mine on 10 works up to 4.9 mph, But it also has a sonar for depth at anytime running on plane and such, but you may have to get a second transducer (Puck shoot thru hull type) but they are relatively inexpensive $50 to 60