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U.S. - Canada ENC Overlap
To comply with internationally agreed practices, Canada and the United States of America have agreed to eliminate overlapping coverage of Electronic Navigation Charts (ENCs). The first area where these changes will take affect are Strait of Juan de Fuca, Haro Strait and Boundary Pass. This new ENC coverage scheme will result in each country changing their areas of coverage, so that only one country’s ENC would be available for any given area at a particular scale.

These changes come into effect 0000 Coordinated Universal Time (UTC), on 15 December, 2011.

When the revised ENCs are available to the public a Notice to Mariner will be issued.

The following represents the ENCs that are affected by this project:

Revised Coastal and General ENCs

Cell Name Producing Authority Title Band Scale Distribution
US2WC12M NOAA San Francisco to Cape Flattery 2 1,200,000 U.S.
US3WA01M NOAA Approaches to Strait of Juan de Fuca Destruction Island to Amphitrite Point 3 176,253 U.S.
CA370203 CHS Approaches to/Approches à Juan de Fuca Strait 3 75,000 Canada
CA370141 CHS Juan de Fuca Strait, Eastern Portion/Partie Est   80,000 To be withdrawn
CA370144 CHS Juan de Fuca Strait   110,000 To be withdrawn

*Note: Mouseover images to see changes to ENC Coverage

Usage Band 2

Usage Band 3

Revised Approach and Harbor ENCs

Cell Name

Producing
Authority

Title

Band

Scale

Distribution

US4WA34M

NOAA

Strait of Juan de Fuca - Eastern Part

4

80,000

U.S.

US5WA43M

NOAA

Haro-Strait-Middle Bank to Stuart Island

5

25,000

U.S.

US5WA44M

NOAA

Boundary Pass

5

25,000

U.S.

CA470075

CHS

Race Rocks to/ à D'Arcy Island

4

40,000

Canada

CA570101

CHS

Sooke Inlet to/à Parry Bay

5

20,000

Canada

CA570214

CHS

Approaches to/Approches à Oak Bay

5

10,000

Canada

*Note: Mouseover images to see changes to ENC Coverage

Usage Band 4

Usage Band 5

 

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