I have tried to make a new tag for seas, as the first question I found was not about travel on sea but on a coastal feature.
Is there an alternative tag we can use for the watery features, or is there an option to change the airport tag into "SEA" and make a second one "sea" or "seas" to distinguis them.
I do not feel that "oceans" would be an useful alternative as many seas do not qualify for oceans.
Edit after seeing the first answer: Would it be a good thing to add an 'airport tag identifier' to the airport tags, as we can not make them capitals?