What is the bridge clearance of your boat? Looking online at the specs for the Fountaine Pajot Bahia 46 Catamaran it looks like the bridge clearance is 66'6". If so you may have issues with some of the fixed bridges, many of which I recall provide 65' of clearance. I'm sure others on this board have more experience in that area, but something to consider.
Pacific Seacraft Crealock 31