Yes, but if they know there's a navigable path but they don't know what it is this is a reasonable approach. Obviously, mapping a destination on an island with

Yes, but if they know there's a navigable path but they don't know what it is this is a reasonable approach. Obviously, mapping a destination on an island with wiggly lines through the water which say "walk" would not be useful, but wasn't the situation I was envisioning.