Decompression Table for Air Diving with Surface Decompression Using Oxygen at Depths from 30 to 230 FSW

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Decompression Table for Air Diving with Surface Decompression Using Oxygen at Depths from 30 to 230 FSW

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Title: Decompression Table for Air Diving with Surface Decompression Using Oxygen at Depths from 30 to 230 FSW
Author: Lambertsen, CJ
Abstract: Calculations for the original EBRDC Decompression Table for Air Diving with Surface Decompression using Oxygen (Draft-1993) separated depth/time schedules into four broad procedural groups (see below) and established a tolerable level of Delta P of Nitrogen for any tissue and an acceptable level of Bubble Growth Index (BGI) for each of the following operational procedures:1. No Decompression.2. No In Water Stops with Sur D 02.3. In Water Stops with SurD 02.4. Dives at or longer than the operational planning limits. Analysis of the limited manned trials conducted in Aberdeen and New Orleans as well as the extensive offshore operational use documented by Sub Sea International suggested improvement in some groups required a more detailed definition. This is especially applicable to the deeper and/or longer dives with surface decompression.All schedules except No Decompression and No Stop dives shallower than 90 FSW have been recalculated to provide more definitive levels of Delta Pat arrival on the surface, and to restrict BGI to a maximum of 2.8 at the end of the surface interval. Oxygen breathing time during the recompression phase is unchanged. However, on schedules that used 2 oxygen cycles at 40 feet on the draft tables, the second cycle has been moved to 30 feet to reduce the Cumulative Pulmonary Toxic Dose (CPTD).This recalculation results in an increase in time spent at specific water stops, the increase in total time ranging from 1 to 16 minutes. Some schedules that were previously no stop now require water stops. Operation planning limits have been shortened on some schedules to reduce general stress, maintain sensible limits of in water decompression time, and control oxygen exposure [Editor's note: full text, remainder of document consists of dive tables]
Description: The items forming the Rubicon Research Repository Christian J. Lambertsen collection are generously donated by the Lambertsen Family. All items in this collection are released through Creative Commons Attribution + Noncommercial + ShareAlike (BY-NC-SA) licenses in an attempt to encourage the use of these works to further scientific understanding of physiology.
URI: http://archive.rubicon-foundation.org/10633
Date: 1995

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