NW-M-0795-24
SÉCURITÉArchivedReceived: 28 May 2024, 00:00Archived: 19 Oct 2026, 12:29Updated: 1 Nov 2026, 20:28
analysis
No longer in forceUnreliable bathymetry in Louisbourg Harbour (Fourchu)
Bathymetric data for Louisbourg Harbour (chart 4376) is unreliable due to major vertical/horizontal datum concerns. Recent surveys show shallower depths than those currently charted. Mariners are advised to exercise extreme caution when using chart 4376 to navigate in the area. Position given for the report: 45° 54.205'N 059° 58.236'W.
Exercise extreme caution when navigating in Louisbourg Harbour and do not rely solely on chart 4376 for depths.
- 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
- Fourchu; Louisbourg Harbour
- Validity
- From 28 May 2024, 16:14 UTC
Date 2024-05-28 16:14 UTC - Hazards
- unreliable bathymetry, shallower depths than charted
- Charts
- 4376(NAD83)
Coast stations for this area
- RCCJRCC HalifaxCanada169 NM from the area
- DSCDSC Station SydneyJRCC HalifaxCanadaMMSI 003160017VHF 40range 40 NM17 NM from the area
- DSCDSC Station Kilkenny LakeJRCC HalifaxCanadaMMSI 003160017VHF 40range 40 NM21 NM from the area
- DSCDSC Station St. ColumbaJRCC HalifaxCanadaMMSI 003160017VHF 40range 40 NM37 NM from the area
- DSCDSC Station Fox IslandJRCC HalifaxCanadaMMSI 003160016VHF 40range 40 NM58 NM from the area
- DSCDSC Station CheticampJRCC HalifaxCanadaMMSI 003160017VHF 40range 40 NM59 NM from the area
Generated automatically from the warning text on 28 Sept 2026, 20:59 UTC. It can be wrong: the original warning below is the authoritative text.
Keywords
- Geometry refscircle_radius
- Geometry phraseswithin
- Malfunctioning AidsUNRELIABLE, UNRELIABLE
Message content
NW-M-0795-24
Date
2024-05-28 16:14 UTC
Status
Published
Title
Waterway information
Areas
Fourchu
Categories
Shallow Depth Reported
Description
It has been recently identified that the current bathymetric data contained within Louisbourg Harbour chart (4376) is unreliable due to major vertical/horizontal datum concerns. Recent bathymetric surveys has shown the presence of shallower depths compared to what is currently charted. Mariners are advised to exercise extreme caution when using this chart to navigate.
Position
45° 54.205'N 059° 58.236'W
Charts
4376(NAD83)