This is a historic ship. No eleveators and several sets of ladders (stairs) to navigate the whole ship, the tank, deck and several exhibilts are available to wheel chairs but the whole ship is not open to wheel chairs.
Service animals are allowed, keep in mind the deck is steel and gets very hot and there are several ladders with treading that are not animal friendly.
Ingalls Harbor is on Hwy 20 (Wilson St) in Decatur, AL about 1 mile west of US 31 and the Tennessee River Bridge.