iGRVT orbital transfer vehicles
Space tugs that carry cargo between orbits
InterGravity Technologies
South Korean startup building small space tugs powered by its own non-toxic nitrous oxide and ethane thrusters. Its first tug mission, CART-1, is planned for early 2027 and is fully booked.
Products, by altitude
Earth to Moon · 35,786–384,400 km
In development
Low Earth orbit · 160–2,000 km
In development iG20 thruster
Small thruster burning non-toxic fuels
Milestones
- Aug 2026 InterGravity said its first OTV mission, both a demonstration and a commercial flight, is scheduled for Q1 2027, with manufacturing and return missions planned for 2029 and 2030. Company statement1
Sources
Updated Oct 22, 2026 · How we source facts · Suggest a correction