The Ternos Professional series is specially designed to meet the exigent needs of extreme divers. It displays a very high water resistance of 50 ATM, it is particularly robustly built, and it has an automatic helium valve set at 9 o'clock, which is essential when using a decompression chamber in very deep water. The three new DAVOSA Ternos Professional models are a modern addition to DAVOSA's popular series, adding a dash of lifestyle to the functional, professional diving collection, effectively bridging the gap between technology and design.  For the Ternos Professional Nebulous Automatic, the mechanics of the watch have been made visible thanks to a semi-transparent sapphire crystal. It lies directly on the movement and is fixed by the skeletonised dial ring, whose indexes filled with SuperLumiNova® BGW9 together with the hand play ensure optimal readability. The water resistance to 500 metres (50 ATM) allows for larger expeditions to deeper underwater destinations. Particularly