TUBSAT-N and Tubsat-N1 are two nanosatellites, which were launched on the 7th of July 1998 as a satellite cluster from a submarine with a russian Shtil-1 rocket in the Barents Sea. All systems are working well and the satellites are in a excellent overall condition. The satellites were separated in orbit via telecommand. Both satellites were developed at the Technical University of Berlin and the complete project was financed by DLR.