Re: 1974 21' Starcraft Holiday (first time boat owner)
Puget, it's not so much finding fish below 450' as locating bottom contours. in one area i fish, the bottom drops off abruptly from a few hundred feet to over 1600, and then there's a reef at about 450' runnning south from one island....again, it drops off to 1500-2000' on either side. both areas create temp breaks and are common billfish trolling areas, and bottom fishing on the reef is a good fall-back if the pelagics ain't cooperating. but for the open 12' boat i'm using now, that unit i have is just perfect.
Jonny, your boat is looking great. love the idea of salvaged wood....that stuff makes great guitars too, very dense due to the absorbed minerals etc and thus great tonewood. and i figure it's had a fairly thorough rot test.......(yeah, i know this is not an issue with most any cypress, sinker wood or otherwise)