NW-C-1111-26
PAN PANReceived: 29 Apr 2026, 00:00Updated: 1 Nov 2026, 12:53
analysis
ActiveShoal confirmed between Trois-Rivières and Donnacona (depth 8.7 m)
A shoal has been surveyed and confirmed in the river between Trois-Rivières and Donnacona. The feature is bounded by four positions with a centroid at 46°24.242'N 072°23.038'W and least depth 8.7 m. Shoals number Q5005/26 applies and previous warning NW-C-0284-26 is cancelled. Consult chart 1313 (NAD83) for details.
Navigate with caution and consult chart 1313 (NAD83); avoid the shoal area if your vessel's draught requires greater safety margin.
- 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
- Validity
- From 29 Apr 2026, 20:37 UTC
Date 2026-04-29 20:37 UTC. In Force Shoals number Q5005/26 refers. - Hazards
- shoal, shallow depth
- Least depth
- 8.7 m (29 ft)
- Cancels
- NW-C-0284-26
- Charts
- 1313(NAD83)
Coast stations for this area
- RCCJRCC QuebecCanada54 NM from the area
- RCCRCC BostonUnited States250 NM from the area
- RCCJRCC TrentonCanada257 NM from the area
- DSCDSC Station Trois-RivieresJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM3 NM from the area
- DSCDSC Station SorelJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM37 NM from the area
- DSCDSC Station Mont BelairJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM44 NM from the area
- DSCDSC Station QuebecJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM54 NM from the area
- DSCDSC Station LauzonJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM56 NM from the area
Generated automatically from the warning text on 28 Sept 2026, 17:18 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-1111-26
Date
2026-04-29 20:37 UTC
Status
Published
Title
Newly Discovered Dangers
Cancels
NW-C-0284-26
Areas
Trois-Rivières to Donnacona
Categories
Shallow Depth Confirmed
Description
Shoal located in area bounded by:
46 24.233N 72 22.997W
46 24.240N 72 23.080W
46 24.251N 72 23.078W
46 24.244N 72 22.995W
Depth: 8.7m
In Force Shoals number Q5005/26 refers.
Position
Centroid : 46° 24.242'N 072° 23.038'W
Pt 1: 46° 24.233'N 072° 22.997'W
Pt 2: 46° 24.240'N 072° 23.080'W
Pt 3: 46° 24.251'N 072° 23.078'W
Pt 4: 46° 24.244'N 072° 22.995'W
Charts
1313(NAD83)