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The VDU patches below will update certified libraries on Edition 26 to 34/23.

* To download individual libraries or patches, right-click on the link and choose 'Save Target As' (for IE) or 'Save Link As' (for Netscape). To download multiple files at once, use the checkboxes to select the files, and click the 'Download' button at the bottom of the list. Once the files have been downloaded, the user must use Winzip 9.0 or earlier editions to extract from the .zip files.

Kara Sea       Scandinavia, Baltic       Svalbard (Norway)      


*Rows highlighted below in this color are cancelled libraries since the latest New Edition.*
*Rows highlighted below in this color are new libraries available with the latest New Edition.*

IMPORTANT: As of 15 November 2021, NGA's Maritime Safety Office no longer supports DNC VDU UNIX patches. If you have questions or concerns please contact NGA via the Maritime Quality Feedback System (MQFS)

Number Name Download
full library
Download VDU Patch
Download VDU Patch 
Cancelled or
New Libraries
     N/A NtM
COA22A Western Svalbard, Norway N/A   Windows
       424.4 KB
N/A -
COA22B Ostrov Belyy to Ostrov Dikson, Russia N/A   Windows
       955 Bytes
N/A -
COA22C Proliv Karskiye Vorota and Proliv Yugorskiy Shar, Russia N/A   Windows
       118.0 KB
N/A -
COA22D Mys Teriberskiy to Mys Konushin, Russia N/A   Windows
       165.0 KB
N/A -
COA22E White Sea, Russia N/A   Windows
       329.7 KB
N/A -
COA22F Ostrov Kil'Din, Russia to Masoya, Norway N/A   Windows
       155.1 KB
N/A -
COA22G Hjelmsoya to Ertnoya, Norway N/A   Windows
       267.2 KB
N/A -
COA22H Vega to Andoy, Norway N/A   Windows
       279.2 KB
N/A -
COA22I Southern Baltic, Sweden - Denmark - Poland N/A   Windows
       128.3 KB
N/A -
COA22J Gdynia, Poland to Klaipeda, Lithuania N/A   Windows
       141.6 KB
N/A -
COA22K Stockholm-Sundsvall, Sweden and Aland, Finland N/A   Windows
       336.0 KB
N/A -
COA22L Northern Gulf of Bothnia N/A   Windows
       322.3 KB
N/A -
COA22M Gulf of Finland, Estonia - Finland - Russia N/A   Windows
       408.0 KB
N/A -
COA22N Ventspils, Latvia to Klaipeda, Lithuania and Vastervik to Landsort, Sweden N/A   Windows
       133.7 KB
N/A -
COA22P Central Baltic, Sweden N/A   Windows
       227.8 KB
N/A -
COA22Q East Kattegat, Sweden - Denmark N/A   Windows
       64.8 KB
N/A -
COA22R Gulf of Riga, Latvia - Estonia N/A   Windows
       204.4 KB
N/A -
COA22S Northern Spitsbergen, Norway N/A   Windows
       221.6 KB
N/A -
COA22T Northern White Sea, Russia N/A   Windows
       176.3 KB
N/A -
COA22U Southern Gulf of Bothnia N/A   Windows
       375.6 KB
N/A -
COA22V Eastern Gulf of Finland N/A   Windows
       439.5 KB
N/A -