Introduced in January at the San Francisco DEMA show, the Short Form No-Decompression Table is already being used as an entry level table in Australia as a lead-in to the DCIEM or the U.S. Navy tables. The short Form "No-D" can be taught to an entry-level class in only 10 - 15 minutes. It allows for as many as three no-decompression dives.
The No-D table was originally designed for use in resort courses where no prior instruction has been given in DCS prevention. During the development of the No-D, it evolved into an entry-level table.
The Table represents a new concept, in that it eliminates portrayal of repetitive groups, residual nitrogen times, multiple lines, arrows and flow charts. The main features of the table are it's conservatism and simplicity. The short form is based entirely on the highly respected DCIEM tables. However, it can be very easily used to introduce the U.S. Navy tables as well.
Before publication, the No-D table was reviewed by some of the leading decompression experts in North America. Their input was integrated into the dive table's procedures.
The creator of the No-D, Gain Wong (NAUI #5225), works very closely with the DCIEM Experimental Diving Unit. His company, U.D.T., is the licensed publisher of the DCIEM tables and diving manuals.
The entire table is contained on the front of a 4" x 6" laminated plastic chart with clear, simple instructions on the back for easy reference. Divers can record their dive profile information on the back of the table as well.
The ascent rate, safety stop recommendations and emergency decompression procedures are taken from the 1995 DCIEM sport diving procedures.
To use the short form table, one finds the depth in depth column and reads the first dive no decompression limit from the column to the left of the depth column; e.g., first dive limit for 60 feet is 50 minutes.
To find the no-decompression limit for a repetitive dive, match the surface interval with the depth of the repetitive dive; e.g., the repetitive dive no-decompression limit for a 50-foot dive after a surface interval of two hours is 38 minutes. The minimum surface interval required is 30 minutes.
The table allows for as many as three no-decompression dives, followed by a maximum surface interval of 16 hours. Looking at the table, you will observe a Maximum Range Column: the first dive's maximum depth is 130' (for very experienced divers, of course), the second dive is limited to a maximum of 90' and a third dive to a maximum of 50'. These maximum depths follow the 1995 DCIEM sport diving recommendations. The table conforms as well to the U.S. Navy table concept of a shallower depth for each successive dive. - a standard safety recommendation.
This means that a beginner could make up to three dives at depths of 50' or less. On the other hand, a more experienced diver could make tow dives between 60' and 90' and make a third dive at 50' or less.
This is the simplest dive table in the world and is ideal for entry-level or resort divers making no decompression dives. The short form table is not intended for decompression dives, multi-level dives, or dives at altitude. For those activities the NAUI/DCIEM sport diving tables or the NAUI/U.S. Navy dive tables are recommended.
Finally, we have something to fill the gap in resort training as well as a straightforward entry-level table that can be taught in minutes rather than hours.
To purchase your copy visit our ONLINE SHOPPING BOUTIQUE
