Glossary

It is a one-way valve specific to deep-sea diving watches. This valve helps release the helium gas that may enter the watch during deep dives. The accumulation of this gas inside the watch can lead to the explosion of the watch crystal as the diver ascends to the surface. The helium escape valve allows for the safe release of the helium gas pressure without allowing water molecules to enter the watch.

The helium escape valve allows the small helium particles to escape while preventing the entry of water molecules. This feature helps protect the watch and ensure its proper functioning during and after deep-sea diving. However, the helium escape valve is not necessary for regular recreational diving.