cowed is a attachment that does" Attached character cannot be declared alone as attacker or defender."

will this stop a naval characters being declaired by its self via its enchancment?

My unsdertsnading of it:

"Cowed" will prevent them from being declared during the regular framework declaration unless they are declared as an attacker/defender at the same time as at least one other character (in the framework, all attackers/defenders are declared together).

Cowed will prevent them from being declared as a naval attacker AT ALL, since they will always be declared alone (naval declaration is a player action, so each naval declaration happens separately).