Walkthroughs for custom maps.

I looked at the screenshots and drew a conclusion:
"When flying over water, if there are monsters, items, or objects on the water that require stopping for interaction (landing on water is not permitted), they must be flown around – you cannot fly over them. The trajectory can be any, as long as there are enough movement points to reach an empty cell on land."
This isn't about quests, but rather that interacting with any of these objects requires landing on the water. And it is not permitted for a hero without a boat to land on water.
In connection with this, a question arose (inspired by HotA). If a hero in a boat activates flight, can they fly over obstacles (patches of land) on the water? Dimension Door seemingly allows this (although I haven't had the chance to check).
Checked it - teleporting in a boat is no problem (the main thing is that it's onto water), but flying would be too much.