Dive tables

Dive tables

Dive Tables, Decompression Tables or Tables are printed cards or booklets that allow divers to determine for a particular dive profile and breathing gas, the Decompression stops required for that dive in order to avoid decompression sickness.

With dive tables, it is assumed that the dive profile is a "square dive", meaning that the diver descends to maximum depth immediately and stays at the same depth until resurfacing (approximating a rectangular line when drawn in a coordinate system where one axis is depth and the other is duration). Some dive tables also assume physical condition or qualifications of the diver, e.g., Navy dive tables should not be used by recreational divers.

More complex tables can take into account staged dives, dives performed at altitude, and decompression dives.

History

The knowledge of decompression and decompression sickness developed in the 19th century. The studies used sponge diver experiences as input. The first workable decompression table came available in 1908. [cite journal |last=Boycott |first=A. E. |coauthors=G. C. C. Damant, J. S. Haldane. |title=Prevention of compressed air illness |journal=J. Hygiene |volume=8 |pages=342–443 |date=1908 |url=http://archive.rubicon-foundation.org/7489 |accessdate=2008-08-06 ]

Common Decompression Tables

* US Navy Tablescite book |authors=US Navy |title=US Navy Diving Manual, 6th revision |year=2006 |publisher=US Naval Sea Systems Command |location=United States |url=http://www.supsalv.org/00c3_publications.asp?destPage=00c3&pageID=3.9 |accessdate=2008-06-15 ]
* Bühlmann tables [cite book |title=Decompression-Decompression Sickness |last=Bühlmann |first=A. A. |year=1984 |publisher=Springer-Verlag |location=Berlin New York |isbn=0387133089 ] [cite book |title=Tauchmedizin |language=German |last=Bühlmann |first=A. A. |year=1995 |publisher=Springer-Verlag |location=Berlin |isbn=3540555811 ] [cite book |title=Tauchmedizin: Barotrauma Gasembolie Dekompression Dekompressionskrankheit |language=German |last=Bühlmann |first=A. A. |year=1992 |publisher=Springer-Verlag |location=Berlin |isbn=3540555811 ]
* BSAC 88 tables
* PADI tables: the recreational dive planner (RDP) [cite journal |author=Hamilton Jr RW, Rogers RE, Powell MR |title=Development and validation of no-stop decompression procedures for recreational diving: the DSAT recreational dive planner |publisher=Diving Science & Technology Corp. |location=Tarrytown, NY |date=1994 |url=http://archive.rubicon-foundation.org/4228 |accessdate=2008-06-15 ] and "the wheel"
* DCIEM tables
* French Navy 90 Tables

Alternatives

* the Dive computer - has the advantages of monitoring the actual dive, as opposed to the planned dive, and does not work on a "square profile" - it dynamically calculates the real profile of depth over time.
* bespoke tables generated by decompression software - represent a diver's specific dive plan and breathing gas mixtures.
* Ratio deco is a simplified method for quickly determining the necessary decompression profile without the use of written tables or computers. It is taught in advanced diving courses held by GUE instructors. Ratio Deco relates to using a known set point of decompression obligation related to a specific depth and bottom time. The decompression obligation changes in set increments relative to the set point with changes in actual depth or bottom time.
* Decompression software such as [ [http://www.gue.com/ DecoPlanner, decompression simulation software] ] [ [http://www.gap-software.com/ GAP-software, decompression simulation software] ] , used to simulate decompression profiles with different gas mixtures.

External links

* [http://www.ndc.noaa.gov/dp_forms.html Dive tables from the NOAA]

References


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • dive tables — numerical tables used by scuba divers to determine time limits of dives, according to depth, as well as possible decompression delays during ascent and requisite surface intervals between dives. Also called decompression tables. * * * …   Universalium

  • dive tables — numerical tables used by scuba divers to determine time limits of dives, according to depth, as well as possible decompression delays during ascent and requisite surface intervals between dives. Also called decompression tables …   Useful english dictionary

  • Dive computer — A watch sized dive computer incorporating an electronic compass and the ability to display cylinder pressure when used with an optional transmitter (Suunto D9) A dive computer or decompression meter is a device used by a scuba diver to measure… …   Wikipedia

  • Tables de décompression — pour plongée Nitrox Les tables de décompression ou tables de plongée sont utilisées par les plongeurs afin de gérer leur remontée en surface tout en permettant à leur organisme d éliminer l azote emmagasiné au long de la plongée. Elles permettent …   Wikipédia en Français

  • Tables de decompression — Tables de décompression Tables de décompression pour plongée Nitrox Les tables de décompression ou tables de plongée sont utilisées par les plongeurs afin de gérer leur remontée en surface tout en permettant à leur organisme d éliminer l azote… …   Wikipédia en Français

  • Tables de plongée — Tables de décompression Tables de décompression pour plongée Nitrox Les tables de décompression ou tables de plongée sont utilisées par les plongeurs afin de gérer leur remontée en surface tout en permettant à leur organisme d éliminer l azote… …   Wikipédia en Français

  • Dive profile — A dive profile is a two dimensional graphical representation of a dive showing depth and time. It is useful as an indication of the risks of decompression sickness and oxygen toxicity and also the volume of open circuit breathing gas needed for a …   Wikipedia

  • dive — 01. Jeremy was afraid to [dive] in the water, so his sister pushed him. 02. He [dove] into the icy water, and then quickly jumped out. 03. He [dived] into the icy water, and then quickly jumped out. 04. Marly jumped off the highest [diving] board …   Grammatical examples in English

  • Dive bar — The outdoor signage of a dive bar in Los Osos, California nicknamed “The Marriage Breaker” by local residents. A dive bar is a type of bar or pub. Dive bars generally have a relaxed and informal atmosphere they are often referred to by local… …   Wikipedia

  • Dive boat — A live aboard dive boat on the Similan Islands, Thailand. A dive boat is a boat that scuba divers use to reach a diving site which they could not reach by swimming from land. Contents …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”