Bathy 120 MemoDepth

The 200m water resistant Raider Bathy 120 MemoDepth can indicate a diving depth of up to 120 meters. It performs this measurement with a simple but unconventional technique, wherein the water is allowed to enter the watch through a special chamber that houses a copper membrane. The perforation provided on the case back allows the water to enter this chamber, which is hermetically sealed from the one containing the watch movement, thereby protecting the watch while measuring vital information necessary during a dive.

The copper membrane temporarily deforms as a result of the increasing water pressure entering the chamber, and this information is registered by a mechanical contact sensor and relayed to the blue depth hands visible on the dial. The current depth of up to 120 m is read off using the central blue hand on a linear scale marked on the outer edge of the dial. A fine scale allows a detailed reading for the first 30 metres of depth. Two red markings between 3 and 6, and between 9 and 12 visible on the outer edge of the dial also indicate to the diver the most important decompression stops that should be undertaken during ascent.

The Raider Bathy 120 MemoDepth also has a memory function. The sub-dial at 3H shows the maximum depth you have reached during your dive. As the diver descends and the depth increases, the central as well as a the small blue hands rotate clockwise to indicate the current depth. A gear mechanism designed ensures that the pointer on the subdial stops at the maximum diving depth so that this maximum diving depth can be reliably read off on a graduated scale. Meanwhile, during an ascent, the central blue hand rotates anti-clockwise to indicate the current depth during the ascent.