Space Tankers - two vessels which can be used for refuelling of another spaceships. One tanker (Tanker) is a simple non-reusable ship and next one is a winged reusable ship (Albatros).
Required add-ons:ENERGY project (www.orbithangar.com/showAddon.php?id=c3d0c378-aa41-4565-8910-383b1d488382)Space Tugs (www.orbithangar.com/showAddon.php?id=eb4a1721-7f7a-4a0c-9a56-c6ab428f2bc6)Redesigned for Orbiter Space Flight Simulator 2016 Edition (build 160828)