Tunnel

Tunnel is a Infrastructure building in Surviving Mars.

Description
The tunnel entrance and exit can connect power and life support grids at different locations and different elevations. Rovers can travel along the tunnels to reach places they otherwise couldn't.

Strategy
Tunnels are ideal for connecting bases that are far across the map from one another, even if they are at different elevations. Long chains of pipes and cables require drone commanders and supply depots spread out along their length for maintenance, but tunnels require no maintenance and can transmit both power and water. It is not necessary to have both ends of the tunnel be within range of a drone commander, despite the warning message present when building one.