NW-C-1437-26
PAN PANReceived: 13 May 2026, 00:00Updated: 2 Nov 2026, 01:50
analysis
ActiveShoal (10.6 m) reported between Montréal and Trois-Rivières
A newly discovered shoal has been reported in the St. Lawrence River between Montréal and Trois-Rivières. The shoal centroid is at 46°12.650'N 072°48.667'W with a least depth of 10.6 metres. Positions of four bounding points are provided and charted on chart 1312 (NAD83). Mariners should note the hazard and navigate with caution.
Navigate with caution and allow for reduced underkeel clearance; update charts and passage plans accordingly.
- 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
- Montréal to Trois-Rivières
- Validity
- From 13 May 2026, 19:05 UTC
Date 2026-05-13 19:05 UTC - Hazards
- shoal, shallow depth
- Least depth
- 10.6 m (35 ft)
- References
- Shoals number Q5074/26
- Charts
- 1312(NAD83)
Coast stations for this area
- RCCJRCC QuebecCanada75 NM from the area
- RCCJRCC TrentonCanada236 NM from the area
- RCCRCC BostonUnited States244 NM from the area
- DSCDSC Station SorelJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM16 NM from the area
- DSCDSC Station Trois-RivieresJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM19 NM from the area
- DSCDSC Station Mont-St. BrunoJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM45 NM from the area
- DSCDSC Station MontrealJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM52 NM from the area
- DSCDSC Station L’AcadieJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM58 NM from the area
Generated automatically from the warning text on 28 Sept 2026, 16:57 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-1437-26
Date
2026-05-13 19:05 UTC
Status
Published
Title
Newly Discovered Dangers
Areas
Montréal to Trois-Rivières
Categories
Shallow Depth Confirmed
Description
Shoal located in area bounded by:
46 12.649N 072 48.666W
46 12.649N 072 48.668W
46 12.650N 072 48.669W
46 12.651N 072 48.667W
Depth: 10.6 metres
In Force Shoals number Q5074/26 refers.
Position
Centroid : 46° 12.650'N 072° 48.667'W
Pt 1: 46° 12.649'N 072° 48.666'W
Pt 2: 46° 12.649'N 072° 48.668'W
Pt 3: 46° 12.650'N 072° 48.669'W
Pt 4: 46° 12.651'N 072° 48.667'W
Charts
1312(NAD83)