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). 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 to coverage come into effect 0000 Coordinated Universal Time (UTC), on 26 July, 2012.
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
No changes are proposed for Band 1
| Cell Name |
Producing Authority |
Title |
Band |
Scale |
Distribution |
| CA176030 |
CHS |
Gulf of Maine to Strait of Belle Isle |
1 |
3,500,000 |
Canada |
| CA176140 |
CHS |
Cape Breton to Cape Cod |
1 |
1,000,000 |
Canada |
| Cell Name |
Producing Authority |
Title |
Band |
Scale |
Distribution |
| US2EC04M |
NOAA |
West Quoddy Head to New York |
2 |
675,000 |
U.S. |
| US2EC03M |
NOAA |
Cape Sable to Cape Hatteras |
2 |
1,200,000 |
U.S. |
| CA276206 |
CHS |
Approaches to Bay of Fundy |
2 |
300,000 |
Canada |
| CA276367 |
CHS |
Georges Bank – Eastern Portion |
2 |
175,000 |
Canada |
| CA276241 |
CHS |
Bay of Fundy (Inner Portion) |
2 |
200,000 |
Canada |
| CA276800 |
CHS |
Yarmouth to Halifax |
2 |
300,000 |
Canada |
| US3EC10M |
NOAA |
Bay of Fundy to Cape Cod |
3 |
378,838 |
U.S. |
| US3EC05M |
NOAA |
to be withdrawn |
3 |
500,000 |
to be withdrawn |
| CA376330 |
CHS |
Grand Manan |
3 |
60,000 |
Canada |
| CA376018 |
CHS |
Tusket Islands to Cape St. Marys |
3 |
60,000 |
Canada |
| CA376044 |
CHS |
Little Hope Island to Cape St. Marys |
3 |
150,000 |
Canada |
*Note: Mouseover images to see changes to ENC Coverage
For Band 2 and 3, the United States will cut its cells in favor of Canada’s cells.
Revised Approach and Harbor ENCs
Cell Name |
Producing
Authority |
Title |
Band |
Scale |
Distribution |
| CA476035 |
CHS |
Passamaquoddy Bay and St. Croix River |
4 |
50,000 |
Canada |
| CA476547 |
CHS |
Grand Harbour |
4 |
25,000 |
Canada |
| US4ME50M |
NOAA |
Quoddy Narrows to Petit Manan Island |
4 |
80,000 |
U.S. |
| US5ME57M |
NOAA |
to be withdrawn |
5 |
50,000 |
to be withdrawn |
| CA576036 |
CHS |
Todd’s Point |
5 |
15,000 |
Canada |
| CA576037 |
CHS |
Beaver Harbour |
5 |
15,000 |
Canada |
| CA576038 |
CHS |
St. Andrews |
5 |
15,000 |
Canada |
| US5ME54M |
NOAA |
Grand Manan Channel Southern Part |
5 |
50,000 |
U.S. |
| US5ME55M |
NOAA |
Grand Manan Channel Northern Part; North Head and Flagg Cove |
5 |
50,000 |
U.S. |
| US5ME56M |
NOAA |
Campobello Island; Eastport Harbor |
5 |
20,000 |
U.S. |
| US6ME56M |
NOAA |
Eastport Harbor |
5 |
5,000 |
U.S. |
| CA576034 |
CHS |
to be withdrawn |
5 |
5,000 |
to be withdrawn |
| CA576033 |
CHS |
to be withdrawn |
5 |
20,000 |
to be withdrawn |
| CA576546 |
CHS |
Long Island Bay |
5 |
12,904 |
Canada |
| CA576548 |
CHS |
North Head Wharves |
5 |
5,000 |
Canada |
*Note: Mouseover images to see changes to ENC Coverage
No changes are proposed for Band 4.
For Band 5:
The United States will cancel US5ME57M and cut back US5ME55M and 54M in favor of CA576546
Canada will cancel CA576034 and CA576033 in favor of US5ME56M and US6ME56M.
