Tunnels can not be opened if the northwest corner is more than 4 dirts below [[Water#Water level|water level]].
* Important Note: You cannot surface mine to correct an oddly shaped opening, so you must make sure to have the tile in the shape you want it to be, before you open the mine.
=== Opening a ship tunnel ===
Note: You can tunnel at 0 stamina while climbing but a boat close by for stamina regain is recommended as its slow.
*Important Note: You cannot surface mine to correct an oddly shaped opening, so you must make sure to have the tile in the shape you want it to be, before you open the mine.
=== Surface mining ===