What does "Transform Ship" do? It has keybinding T for it
When I go to Options -> Keybindings, there is T for "Transform Ship". What does it do? Google searching "Sunless sea Transform ship" gives nothing.
Solution 1:
The new keybinding is part of the Zubmariner expansion to Sunless Sea, which was released on October 11, 2016. That expansion is all about exploring the sea floor.
Once you complete a decent-sized quest a Port Carnelian, pressing T will transform your ship into a zubmarine. Then you'll immediately dive.