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The VDU patches below will update certified libraries on Edition 30 to 24/22.

* 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.

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*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
(Windows)
Download VDU Patch 
(Unix)
Cancelled or
New Libraries
     N/A NtM
date
A2519520 Cross Sound to Lynn Canal, Alaska   Edition 30
       3.0 MB
  Windows
       839.9 KB
N/A -
A2519630 Controller Bay; Katalla, Alaska   Edition 30
       726.2 KB
  Windows
       1.3 KB
N/A -
A2519670 Eastern Prince William Sound; Valdez, Alaska   Edition 30
       3.5 MB
  Windows
       604.4 KB
N/A -
A2519740 Western Prince William Sound; San Juan Cannery, Alaska   Edition 30
       5.1 MB
  Windows
       2.0 KB
N/A -
A2519760 Blying Sound; Seward, Alaska   Edition 30
       2.4 MB
  Windows
       758.0 KB
N/A -
A2519781 Homer, Alaska   Edition 30
       2.6 MB
  Windows
       732.8 KB
N/A -
A2519788 Ninilchik, Alaska   Edition 30
       2.8 MB
  Windows
       3.3 KB
N/A -
A2519800 Anchorage, Alaska   Edition 30
       1.9 MB
  Windows
       568.7 KB
N/A -
A2519820 Marmot/Chiniak Bays; Kodiak, Alaska   Edition 30
       2.8 MB
  Windows
       2.2 KB
N/A -
A2519995 Cape Douglas to Cape Unalishagvak, Alaska   Edition 30
       2.4 MB
  Windows
       2.2 KB
N/A -
A2520090 Cold Bay; Pavlof Islands; Sanak, Alaska   Edition 30
       5.0 MB
  Windows
       1.1 MB
N/A -
A2520120 Krenitzin Islands; Dutch Harbor, Alaska   Edition 30
       2.0 MB
  Windows
       1.5 KB
N/A -
A2520160 Kiska Island to Amchitka Island, Alaska   Edition 30
       2.6 MB
  Windows
       2.2 KB
N/A -
A2520321 Cape Etolin, Nunivak Island, Alaska   Edition 30
       221.7 KB
  Windows
       738 Bytes
N/A -
COA25A Rat Islands   Edition 30
       853.9 KB
  Windows
       515 Bytes
N/A -
COA25B Aleutian Islands to Anchor Bay   Edition 30
       5.8 MB
  Windows
       1.5 KB
N/A -
COA25C Kuskokwim Bay; Bristol Bay; Semidi Islands   Edition 30
       4.6 MB
  Windows
       890 Bytes
N/A -
COA25D Cook Inlet; Prince William Sound; Kodiak Island   Edition 30
       8.1 MB
  Windows
       1.6 MB
N/A -
COA25E Yakutat Bay to Whale Bay   Edition 30
       4.7 MB
  Windows
       1.1 MB
N/A -
COA25F Cape Romanzof to Nunachik Pass   Edition 30
       669.9 KB
  Windows
       515 Bytes
N/A -
COA25G Pribilof Islands   Edition 30
       372.1 KB
  Windows
       670 Bytes
N/A -
COA25H Bering Sea-180 W, 61:14 N to 178:30 W, 63 N N/A   Windows
       310 Bytes
N/A -
COA25I Meynypil'gino to Mys Leonida N/A   Windows
       400 Bytes
N/A -
COA25J Southeast Cape; Saint Lawrence Island   Edition 30
       120.9 KB
  Windows
       475 Bytes
N/A -
COA25K Saint Matthew Island   Edition 30
       101.0 KB
  Windows
       355 Bytes
N/A -
COA25L Unimak Islands to Anchor Bay   Edition 30
       7.6 MB
  Windows
       2.5 MB
N/A 48/21
COA25M Kuskokwim Bay to Bristol Bay   Edition 30
       2.7 MB
  Windows
       835 Bytes
N/A 48/21
GEN25A Rat Islands; Cape Navarin, Russia N/A   Windows
       690 Bytes
N/A -
GEN25B Bering Sea; Gulf of Alaska; Aleutian Islands   Edition 30
       6.0 MB
  Windows
       655.9 KB
N/A -
H2519410 Sitka, Baranof Island, Alaska   Edition 30
       4.8 MB
  Windows
       1.4 KB
N/A -
H2519415 Neva Strait; Neva Point to Zeal Point, Alaska   Edition 30
       2.3 MB
  Windows
       2.0 KB
N/A -
H2519420 Sergius Narrows, Alaska   Edition 30
       3.6 MB
  Windows
       2.2 KB
N/A -
H2519450 Elfin Cove; Chichagof Island, Alaska   Edition 30
       142.5 KB
  Windows
       421 Bytes
N/A -
H2519451 Inian Cove, Inian Island, Alaska   Edition 30
       83.3 KB
  Windows
       364 Bytes
N/A -
H2519588 Haines, Alaska   Edition 30
       157.5 KB
  Windows
       440 Bytes
N/A -
H2519589 Tanani Point, Alaska   Edition 30
       124.2 KB
  Windows
       82.2 KB
N/A -
H2519590 Skagway, Alaska   Edition 30
       199.3 KB
  Windows
       440 Bytes
N/A -
H2519640 Cordova, Alaska   Edition 30
       443.7 KB
  Windows
       613 Bytes
N/A -
H2519670 Valdez & Valdez Marine Terminal, Alaska   Edition 30
       1.5 MB
  Windows
       1.5 KB
N/A -
H2519680 Whittier, Alaska   Edition 30
       575.3 KB
  Windows
       753 Bytes
N/A -
H2519700 Drier Bay, Knight Island, Alaska   Edition 30
       1.3 MB
  Windows
       1.2 KB
N/A -
H2519760 Seward, Alaska   Edition 30
       194.7 KB
  Windows
       60.4 KB
N/A -
H2519781 Homer, Alaska   Edition 30
       211.6 KB
  Windows
       402 Bytes
N/A -
H2519788 Ninilchik, Alaska   Edition 30
       88.3 KB
  Windows
       402 Bytes
N/A -
H2519790 Kenai, Alaska   Edition 30
       370.7 KB
  Windows
       879 Bytes
N/A -
H2519795 Nikiski, Alaska   Edition 30
       180.8 KB
  Windows
       547 Bytes
N/A -
H2519800 Anchorage, Alaska   Edition 30
       1.3 MB
  Windows
       164.1 KB
N/A -
H2519803 North Foreland, Alaska   Edition 30
       99.3 KB
  Windows
       421 Bytes
N/A -
H2519805 Drift River, Alaska   Edition 30
       150.0 KB
  Windows
       421 Bytes
N/A -
H2519808 Iliamna Bay, Alaska   Edition 30
       215.7 KB
  Windows
       402 Bytes
N/A -
H2519809 Whale Passage, Alaska   Edition 30
       142.5 KB
  Windows
       383 Bytes
N/A -
H2519810 Ouzinkie, Spruce Island, Alaska   Edition 30
       223.6 KB
  Windows
       580 Bytes
N/A -
H2519820 Kodiak, Kodiak Island, Alaska   Edition 30
       1.7 MB
  Windows
       921 Bytes
N/A -
H2519995 Alinchak Bay, Alaska   Edition 30
       181.4 KB
  Windows
       467 Bytes
N/A -
H2520120 Dutch Harbor, Unalaska Island, Alaska   Edition 30
       2.1 MB
  Windows
       1.5 KB
N/A -
H2520140 Adak Naval Air Station, Adak Island, Alaska   Edition 30
       1.8 MB
  Windows
       1.3 KB
N/A -
H2520150 Constantine, Amchitka Island, Alaska   Edition 30
       392.0 KB
  Windows
       421 Bytes
N/A -
H2520160 Kiska Island; Little Kiska Island, Alaska   Edition 30
       963.8 KB
  Windows
       846 Bytes
N/A -