Changes and comments

Nettstedet for Norske dykke- og behandlingstabeller

Changes and comments

About this website

This website is edited by Jan Risberg (principal author of NDTT 4th edition). It is constructed to be a link between the authors and readers of these tables. Corrections and comments to the tables will be formalized through publication of new revisions. In the time period preceding a revision, there will be discussion between the editors as well as professionals. This website will present suggestions for table changes. We sincerely appreciate comments to the tables: supportive, improvement proposals, inaccuracies a.s.o. Please send us an  e-mail to allow us to follow up!

Topics discussed on this particular page of the website has not been approved/formalized and is not intended to replace recommendations of the last official edition of the table.The revision proposals available for download at the right hand panel, should not be used operationally.

Areas subject to revision or correction in the sixth edition of the NDTT


The next edition will hold a bottom text on each page identifying the edition/Revision.


A short description of  adjustments introduced in the NDTT relative to the original US Navy Diving Manual Rev 7 has been provided.

Flying after diving

Serial 9, second sentence shold read: "The rules for flying after diving should be respected for all exposures to heights exceeding 1750 m asl.


The authors were approached aug 2019 by the Norwegian Oil and Gas Association, Forum for diving and subsea intervention. We were asked whether we could provide standardized tables for TUP-diving (transfer under pressure). The authors have confirmed our interest to provide a framework for TUP-decompression tables. It is our intention  to give a presentation on this subject on the Bergen International Diving Seminar autumn 2019.


In this panel you may download the latest internal draft/working document for the forthcoming table revision.  This document is not approved for operational use. It is published to stimulate comments. The document has not been properly reviewed and layout is not finalized. This will typically affect Table of contents, location of figures and page shifts. Such errors will not be corrected until the final official revision has been published.