Offshore cranes need to operate reliably in the harshest environment in tropical and arctic climates. Same requirement is set for the slip rings used in those cranes. Offshore crane slip rings may include high and low power slip rings, rotary joint, signal slip ring with even 100 channels and an optical slip ring all integrated together into in the same unit. Combinent has history for building advanced integrated slip ring solutions for demanding off-shore applications since late 90’s. Those slip rings have been working highly reliably during all these years.