Let me clarify, dredging is not for the 60-foot boats but for the sailboats and smaller motor boats. The 60-foot boat owner does not travel through potential shoaling waters, they travel the deeper waters. The real issue is with fixed-keel sailboats with 4-foot-plus drafts, that range 24 feet and more in length. A 45-foot motor boat's draft is just a few more inches than the outboard engine mounted on a 21-foot boat. Therefore, dredging of well-traveled water passages is more for the sailboats and smaller motor boats than the 60-foot boat.