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Updated: Oct 4, 2026

Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 1. Biosafety Level 4 Suit Laboratory Suite Entry and Exit Procedures
Published on: October 3, 2016
Current status of closed circuit underwater breathing apparatus
1Delta P, Port St Lucie, FL 34985, USA.
Abstract:
Closed circuit diving systems are certainly not a new concept, but advanced technology is turning the concept into practical reality. For years the development of these systems has stagnated in their classified covert operations role, but a new group of sophisticated divers--scientists, photographers and technical divers--has emerged to spur the commercial development of closed circuit underwater breathing apparatus. The traditional silent and bubble-free capability is being augmented with such additions as microprocessor usage, dependable oxygen sensing, carbon dioxide sensing, and PC integration.
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