FEATURES
Specify regions or terrain tags that you can disembark/embark for boats, ships and airships. The player can only board or leave those vehicles from the specified regions/tags.
Possible use could include boats landing anywhere, ships only landing at ports, airships having designated airports.
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Galv's RPG Maker Scripts & Plugins 
I used this to replicate Final Fantasy’s airship landing restrictions., where one could only land on grasslands. In OZMASAGA, you can also land on snow, but you can’t land on hills.