I recently found that if you hire a Ballooner you can go ahead and plot moves over terrain. That’s awesome! I think earlier in development that wasn’t the case.
If you cancel the Ballooner, however, your moves stay plotted over terrain. I think it would be better to handle this more gracefully, for example leaving initial moves until they hit land and cancelling the rest.
If you do this and the turn goes, your ship doesn’t hit land but you still have the same impossible path plotted.