The cx25 is an offshore fishing boat with a cabin based on the carolina sport fishing boats lines. the hull is identical to our cs25 fishing boat design plan.. This boat is easy to build using our downloadable boat plans. our boat plans are available for instant download so you can start building right away.. Here’s a classic styled open fishing boat that lends itself to plywood construction. it features a wide beam, outboard well, stability at rest and can be customized.