the entire process could be
1.) Ram, save for below the waterline hits.
2.) fire all weapons. -1 to saving rolls for being in short range.
3.) Board.
I only started playing a year ago, Empire, chaos (Khorne and Nurgle), High elves and Dwarves. I have found the dwarf fleet to be a bit too strong. no boarding until damaged but they have engineers that repair the damage! The norse fleet will need to be lucky that the nautilus cant really get anything done during the game. Somehow be really successful against the monitors and then swarm any ironclads or dreadnaughts by taking advantage of any damage they can do and doing boarding actions. The dwarf armor saves and their turrets are enough to make them a power house but then the boarding actions.....I have yet to defeat a dwarf fleet in any of my pickup or test games.
How long have you been playing, is norse your first fleet?