I want to add an electrical receptacle on the fly bridge as well as on the level between the main deck and fly bridge of our 44 foot Gibson standard. My question is in regards to wire to use. I am installing 15 amp GFI receptacles in both areas and  marine wire is somewhere in the area of $2.50 / foot (14 ga.) or about $120.00 for the entire job. Can another type of wire be used or is this an area where I have to bite the bullet and pay up? Safety would be my first concern but options will always be investigated. Thank you