Doppler bubble detection post dive

Eastern Scheldt construction of Storm Surge Barrier 1978-1986

From Eastern Scheldt to offshore industry

Questions about dive techniques or decompression tables?

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DadCoDat for advice on dive- and decompression techniques

Recent developments  in 2023

Farewell to UPTD?

DMAC35 adviced a new variable for avoiding long term oxygen toxicity instead of UPTD / OTU.  They think ESOT to be better, as it also predicts the decrease of toxic effects, particularly POT (Pulmonary Oxygen Toxicity).

DCD is not convinced and has made available an addendum to the tables showing both OTU and ESOT, as well as an OTU-ESOT Calculator for other decompression or treatment tables, so future will learn what is best.

See pages New Developments and OTU-ESOT Calculator


DCD  decompression  tables

revised  NDC  tables 2015

Decompression tables should never be considered as "absolutely irrevocable", but must be reviewed regularly, based on data (feedback) reported. This urged DadCoDat after more than 25 years to produce a revision of these tables in 2015, to allow the diving industry to continue using reliable standard tables according to present days standards.

The NDC (Netherlands Diving Centre) decompression tables nowadays are a well known phenomenon in the Dutch diving industry.

The computer model was originally developed in 1975 by Prof. Dr. W. Sterk and was used extensively during the construction of the Eastern Scheldt Storm Surge Barrier (1977-1986) as well as in offshore diving. Based on reported dive data, the model has been refined and proved to produce reliable tables.

Prof. Dr. W. Sterk and Dr. M.P.C. van der Huls, both experienced diving medical experts, undertook the task to update the tables and recommendations in accordance with present days insights. Safety of the diver has remained the most important consideration for the development of these DCD / revised NDC tables

Dr. M.P.C. van der Huls

Prof. Dr. W. Sterk