best transducer type/position for a HH 680sf

[azza3010]

I have recently purchased a 1995 HH 680sf and am going to install a new furuno 585 and am wondering if anyone has this set up and can advise on the best type and positon of transducer? My goal is to have a decent reading at cruise, which i am guessing will be around the 55-60km/h range. From what i can gather, a 1 kw wet box set up would be optimal but i want to make certain as i had a lot of transducer problems on my last rig.

[Spaniard_King]

1kw 20 Degree Tilted element, your hull is too thick for the wetbox 1kw

[azza3010]

is the 20 degree tilt to offset the deadrise on the hull? I'm curious because the stern where the transducer will be mounted is considerably less than 20 degrees.