Battery? No thanks: the diving scooter "twindiver" is powered by compressed air and is refuelled on the driving compressor. It is suitable for hobby divers, but also as a rescue and work vehicle. Its economical, radial motor kicks in at full power, is environmentally friendly and easy to maintain. The twindiver can be completely controlled; its infinitely variable depth regulation enables "standing" under water. All components are based on standard diving equipment. The technical development and the precise, streamlined design required a high degree of competence.