We do know about the ship moving on ice glitch where you map copy a ship on ice then surround it you can move it to some destinations but you never knew where it will end or don't know where the ship can go etc...
Well with this utility you can place this ice over the old one and control your ships over the ice normally it kinds makes a good ship crash on the shores or a guy pushing his ship back in the water
This is also working for AoK but i didn't include it in the .ZIP because in The Age of Kings the ice formed some ugly sand around it so it could have been only used in water.
Oh yeah one more thing you can't place a dock on it without AoKts but you can place fish etc... normally without having to use map copy
Correct me, if I'm wrong, but isn't that the same sailable ice, Ingo van Thiel used in his "Gyda's Challenge" in 2001?