Barb galley can attack submarines

[Magma_Dragoon]

I was quite shocked to see the message "While defending, your nuclear submarine (1) killed a barbarian galley (100)". May affect all barbarian vessels.

 

[FeiLing]

Everything that is adjacent to a submarine can attack it. They are only invisible from far away to units that do not detect them (kinda... game will still show you red cursor when you try to move a unit onto a tile that is occupied by a non visible submarine).

Always amusing to see veterans tripping up on some of these lesser known game mechanics (even though they have been in the game since vanilla). Don't worry, happened to me too (for e.g. with Stoneworks on Plains).