Diving Decompression Computer (XDC-2) Validation Dives: 54-75 MSW. Phase II. Protocol DDF Test Number 79-3.
Abstract
The objective of the present series of dives is to evaluate the XDC-2 for operational diving, to determine whether the safe depth as displayed can be followed exactly for safe decompression, and to define the operational limits for its use. The basic dive profile is descent at 18 msw a minute to depth, remaining at that depth for the required time; initial ascent at 18 msw/min. to the calculated safe depth, continuous ascent following the safe depth to 3 msw, a stop at 3 msw until the computer indicates that surfacing is possible, and then ascent to the surface. The DCIEM decompression calculation model has been determined by carrying out a large number of man-dives. The model itself consists of four compartments in series with the same depth-dependent supersaturation ratio applied to all compartments. Under certain conditions, for deep dives or long bottom times, the model gives decompression tables which become inordinately long at the shallow depths when the third and fourth compartments become the controlling compartments for decompression. The maximum bottom times which are intended to define the operational limits for the present dive series have been selected so that the third and fourth compartments are not controlling the decompression. Several bottom times leading toward the maximum bottom time will be tested for each depth.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1979
- Accession Number
- ADA080152
Entities
People
- Ian P. Buckingham
Organizations
- DRDC Toronto