Mirror use

[becephalus]

If you use the mirror to visit sea kingdom do you always lose a whole dive?

I just did my visit to the Sea Kingdom, did my first few quests there, didn't see anything else to do so went back to the boat, and lost the whole morning. Is that how the mirror always works? Or can you still do a dive if you leave the sea kingdom through the door?

[Lod101]

you can still do a dive if you leave to the door.
time advance if you end your dive and using the mirror in the sea people place does that.

[breversa]

Time advances whenever you go back to the boat, whatever the mean.

So as long as you stay underwater, you're free to go wherever you want, and time won't advance.