NW-C-4317-26
SÉCURITÉReceived: 12 Oct 2026, 00:00Updated: 2 Nov 2026, 01:50
analysis
ActiveDaymark unreliable at Île de Grâce (Montréal to Trois-Rivières)
The daymark for the Île de Grâce range rear light (LL 2176) is reported unreliable. Position given at 46° 04.233'N 073° 02.553'W. Mariners should be aware and use other visual aids or instruments as required.
Navigate with caution; do not rely solely on this daymark and use other navigational aids or instruments.
- Type
- Aids to navigation · severity low
- Feed
- Aids to navigationAll warnings of this kind on the map (contributors), or as an API feed: /api/v2/feeds/aton/
- Location
- Montréal to Trois-Rivières, vicinity Île de Grâce
- Validity
- From 12 Oct 2026, 16:59 UTC
2026-10-12 16:59 UTC - Hazards
- daymark unreliable
- Charts
- 1312(NAD83)
Coast stations for this area
- RCCJRCC QuebecCanada88 NM from the area
- RCCJRCC TrentonCanada224 NM from the area
- RCCRCC BostonUnited States239 NM from the area
- DSCDSC Station SorelJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM3 NM from the area
- DSCDSC Station Trois-RivieresJRCC QuebecCanadaMMSI 003160027VHF 40range 40 NM32 NM from the area
- DSCDSC Station Mont-St. BrunoJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM34 NM from the area
- DSCDSC Station MontrealJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM40 NM from the area
- DSCDSC Station L’AcadieJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM47 NM from the area
Aids to navigation affected
- IrregularÎle de Grâce range rear light · LL 2176 · 46° 04.233'N 073° 02.553'W
No aids-to-navigation list in the database yet; aids are shown as the warning names them.
Generated automatically from the warning text on 12 Oct 2026, 17:17 UTC. It can be wrong: the original warning below is the authoritative text.
Keywords
- Malfunctioning AidsUNRELIABLE, UNRELIABLE
Message content
NW-C-4317-26
Date
2026-10-12 16:59 UTC
Status
Published
Title
Aids to Navigation - Daymark
Areas
Montréal to Trois-Rivières
Vicinity
Île de Grâce
Categories
Aids to Navigation (Other)
Aids
Île de Grâce range rear light LL 2176
Description
Daymark unreliable.
Position
46° 04.233'N 073° 02.553'W
Charts
1312(NAD83)