NW-C-4461-26
PAN PANArchivedReceived: 22 Oct 2026, 00:00Archived: 28 Oct 2026, 14:49Updated: 1 Nov 2026, 12:53
analysis
No longer in forceShoal (9.9 m) reported between Trois-Rivières and Donnacona
A shoal with least depth 9.9 metres has been discovered in the area between Trois-Rivières and Donnacona. The shoal is defined by four positions with centroid at 46°39.073'N 071°45.776'W. The report is in force and cancels NW-C-3770-26. Mariners should consult updated charts and navigate with caution in the area.
Navigate with caution, consult updated charts and avoid the shoal position if possible.
- Type
- Wreck / obstruction · 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
- Validity
- From 22 Oct 2026, 18:43 UTC
2026-10-22 18:43 UTC (published); In Force - Hazards
- shoal, shallow depth
- Least depth
- 9.9 m (32 ft)
- Cancels
- NW-C-3770-26
- Charts
- 1314(NAD83)
Coast stations for this area
- RCCJRCC QuebecCanada25 NM from the area
- RCCRCC BostonUnited States260 NM from the area
- RCCJRCC TrentonCanada287 NM from the area
- DSCDSC Station Mont BelairJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM15 NM from the area
- DSCDSC Station QuebecJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM25 NM from the area
- DSCDSC Station LauzonJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM27 NM from the area
- DSCDSC Station Trois-RivieresJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM32 NM from the area
- DSCDSC Station MontmagnyJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM54 NM from the area
Generated automatically from the warning text on 22 Oct 2026, 19:49 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-4461-26
Date
2026-10-22 18:43 UTC
Status
Published
Title
Newly Discovered Dangers
Cancels
NW-C-3770-26
Areas
Trois-Rivières to Donnacona
Categories
Shallow Depth Confirmed
Description
Shoal located in area bounded by:
46 39.026N 071 45.678W
46 39.100N 071 45.889W
46 39.120N 071 45.874W
46 39.046N 071 45.663W
Depth: 9.9 metres
In Force Shoals number Q5271/26 refers.
Position
Centroid : 46° 39.073'N 071° 45.776'W
Pt 1: 46° 39.026'N 071° 45.678'W
Pt 2: 46° 39.100'N 071° 45.889'W
Pt 3: 46° 39.120'N 071° 45.874'W
Pt 4: 46° 39.046'N 071° 45.663'W
Charts
1314(NAD83)