Good morning. I have a new Ranger 2360 bay boat with an APEX 19 MSI. The transducer is mounted on the transom and seems to be working well at very slow speeds. At any speed over about 5 mph I get a lot of what appears to be water turbulence on the 2d sonar and then I loose signal when on plane. I want to mount a thru hull Airmar transducer for better soner coverage both on plane and off. I do go out in the gulf maybe to 200 feet or so but not much deeper so I am thinking a 600w would be fine. Can anyone reccommend which one would be best? Is the 600w enough or go with 1000w? Thanks.