Moonbeam is kinda weird, at least to me. Her ability would be hard to keep track of I would think in a larger game, then again it might not be. Testing would tell.
The Ionics get two more submarines!
Ability: Submarine. This ship sinks when her last mast is eliminated.
flavor: Named for the island she was assembled on, the Voya is one of the first Submarines the Ionics have built. As a result she is susceptible to leaks and constant maintenance.
Ability: Submarine. This ship cannot carry crew.
flavor: Assembled underwater, the Marhi was meant to be a sister vessel to the Voya. Due to her unusual construction however almost no sailor will willingly serve on her, reducing her overall operational effectiveness.