Using silent hunter engine and the management system of the boat, the view point in the ship to make a new game for ships will be great.
What I say is implementing Ships or start a new game with ships like cruisers or battleships.
Imagine, viewing the main cannon fires in 1st person view. Feel the shake when the shell hit our ship hard. And watch the ship sail towards the sun. From the graphic engine SH has, we can make it fun! And I think it would be a certain sure that it can have itself a market share.