The Ukrainian SkyForce company introduced new Kronos fiber optic FPV drones and here the Ukrainian SkyForce company announced the completion of testing and certification of two new fiber optic FPV drones. Kronos 13 and Hera 15. Kronos 13 (photo 1) —. FPV drone with fiber optic control channel and 25 km cable. It is equipped with an analog video signal, has a cruising speed of 60 km/h and is able to stay in the air for up to 24 minutes. Hera 15 (photo 2) is equipped with a 30 km long fiber optic coil. The UAV has a cruising speed of 60 km/h, can carry a load weighing up to 3 kg and stay in the air for up to 28 minutes.