The latest version Revision 7 Change A incorporates changes made since the release of Revision 7 on 1st December 2016. The editors state With this change, we updated technical information, provided clearer guidance, and corrected errors that were identified within Revision 7.For many decades the US Navy Diving Manual has been the ultimate reference source for the diver. Potential readers may feel challenged by the sheer size of the work. At just under 1000 A4 pages this manual is unsurpassed in technical detail and depth. As the ultimate diving reference work the book contains everything you ever wanted to know about diving and many ukryj opis