NW-C-4466-26
PAN PANArchivedReceived: 22 Oct 2026, 00:00Archived: 28 Oct 2026, 14:49Updated: 2 Nov 2026, 01:50
analysis
No longer in forceNewly discovered shoal between Trois-Rivières and Donnacona (St. Lawrence)
A shoal has been confirmed in the St. Lawrence River between Trois-Rivières and Donnacona. The shoal is defined by four positions with a reported least depth of 9.9 metres. Mariners are advised this danger is in force and refers to Shoals number Q5283/26. Chart 1314 (NAD83) is affected.
Navigate with caution, note shoal positions on charts and avoid the area if your vessel’s draught is close to the reported depth.
- Type
- Navigational hazard · severity moderate
- Feed
- Wrecks, obstructions and drifting objectsAll warnings of this kind on the map (contributors), or as an API feed: /api/v2/feeds/hazards/
- Location
- Trois-Rivières to Donnacona (St. Lawrence)
- Validity
- From 22 Oct 2026, 20:12 UTC
Date 2026-10-22 20:12 UTC - Hazards
- shoal (least depth 9.9 metres)
- Least depth
- 9.9 m (32 ft)
- Cancels
- NW-C-3784-26
- Charts
- 1314(NAD83)
Coast stations for this area
- RCCJRCC QuebecCanada26 NM from the area
- RCCRCC BostonUnited States261 NM from the area
- RCCJRCC TrentonCanada286 NM from the area
- DSCDSC Station Mont BelairJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM16 NM from the area
- DSCDSC Station QuebecJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM26 NM from the area
- DSCDSC Station LauzonJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM28 NM from the area
- DSCDSC Station Trois-RivieresJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM31 NM from the area
- DSCDSC Station MontmagnyJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM55 NM from the area
Generated automatically from the warning text on 22 Oct 2026, 20:57 UTC. It can be wrong: the original warning below is the authoritative text.
Keywords
- Geometry refsbounded, polygon
- Dangerous AreaDANGER
- Geometry phrasesarea bounded, bounded by
Message content
NW-C-4466-26
Date
2026-10-22 20:12 UTC
Status
Published
Title
Newly Discovered Dangers
Cancels
NW-C-3784-26
Areas
Trois-Rivières to Donnacona
Categories
Shallow Depth Confirmed
Description
Shoal located in area bounded by:
46 39.742N 071 48.069W
46 39.753N 071 48.100W
46 39.772N 071 48.086W
46 39.761N 071 48.055W
Depth: 9.9 metres
In Force Shoals number Q5283/26 refers.
Position
Centroid : 46° 39.757'N 071° 48.078'W
Pt 1: 46° 39.742'N 071° 48.069'W
Pt 2: 46° 39.753'N 071° 48.100'W
Pt 3: 46° 39.772'N 071° 48.086'W
Pt 4: 46° 39.761'N 071° 48.055'W
Charts
1314(NAD83)