Complex sentence: The Sea-Dweller incorporates a helium escape valve for use with helium-based breathing gas mixtures in saturation diving; this model (ref 16600) has a guaranteed waterproof depth of.
Split into simpler sentences: The Sea-Dweller incorporates a helium escape valve for use with helium-based breathing gas mixtures in saturation diving. This model (ref 16600) had a guaranteed waterproof depth of.