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Navigational Warnings (NAVWARNs) replace Notices to Shipping (NOTSHIPs) and shall be construed as Notices to Shipping
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Showing results 1 to 13, from 13 total results.
Showing results 1 to 13, from 13 total results.
Areas affected by the message
Marine Communications and Traffic Services Centre Phone Line Outage - Great Lakes
2026-04-17 19:39 UTC
NW-C-0905-26

Sarnia MCTS. Telephone line services inoperative at 171857 UTC Apr 2026. If unable to contact Sarnia MCTS, contact JRCC Trenton at 1-800-267-7270.

Areas affected by the message
Seasonal Buoy Program - Great Lakes - Great Lakes
2026-04-13 12:35 UTC
NW-C-0830-26

The seasonal recommissioning of Canadian Coast Guard navigational buoys is underway in the Great Lakes sector.

Mariners requiring additional information are requested to contact the appropriate MCTS Centre, Navigational Warning Issuing Desk, or visit the Canadian Coast Guard Website at the following address: https://e-navigation.canada.ca

Areas affected by the message
Bridge Horizontal Clearance Change - Trent-Severn Waterway - Trent University
2026-03-29 23:01 UTC
NW-C-0687-26

The horizontal clearance of the Faryon bridge at 44 21.495N 078 17.394W is reduced to 10.67 metres from 01 Nov to 30 Apr and 21.34 metres from 01 May to 31 Oct for bridge work. Scaffolding present on both sides of the bridge marked with flashing markers and yellow buoys. Barge 9 metres by 9 metres on site and lit.

Areas affected by the message
Aids to Navigation - Winter conditions - Great Lakes
2026-02-12 14:36 UTC
NW-C-0178-26

Due to winter conditions, many buoys could be iced, laying on their sides, extinguished or burning at reduced intensity.

For more information, contact the appropriate MCTS center.

Cancels NW-C-0171-26 Cancels NW-C-0172-26
Areas affected by the message
Obstruction - Lake Simcoe, Trent-Severn Waterway - Little Cedar Point
2025-11-17 15:11 UTC
NW-C-3546-25

Subsurface scientific moorings temporarily established 3 metres below the surface at:

44 16.889N 079 30.979W
44 16.875N 079 30.986W

Areas affected by the message
Obstruction - Lake Simcoe, Trent-Severn Waterway - Barrie
2025-11-17 14:56 UTC
NW-C-3545-25

Subsurface scientific mooring temporarily established at:

44 23.890N 079 34.297W
44 23.880N 079 34.327W, 3 metres below the surface.

44 23.928N 079 34.277W
44 23.925N 079 34.308W, 8 metres below the surface.

Areas affected by the message
Aids to Navigation - Great Lakes, Lake Nipissing - West Arm
2025-10-14 21:07 UTC
NW-C-3177-25

Privately maintained navigational aids may be unreliable due to multiple buoys reported having discrepancies.

Areas affected by the message
Aids to Navigation - Lake Simcoe, Trent-Severn Waterway - Trout Shoal
2025-07-19 16:29 UTC
NW-C-2180-25

Off position, 400 metres west

Aids: Trout Shoal light buoy S323 LL 1371
Areas affected by the message
Aids to Navigation - Trent-Severn Waterway - Fenelon Falls
2025-06-13 17:38 UTC
NW-C-1622-25

Green spar buoy N21 temporarily established in 44 32.276N 078 44.658W. 

Areas affected by the message
Aids to Navigation - Trent-Severn Waterway - Fenelon Falls
2025-06-13 17:36 UTC
NW-C-1621-25

Temporarily removed. 

Aids: Fenelon River port daybeacon N21
Areas affected by the message
Obstruction - Lake Simcoe, Trent-Severn Waterway - Atherly
2025-06-05 17:32 UTC
NW-C-1499-25

Subsurface scientific equipment placed 3 metres below the surface at 44 36.257N 079 22.179W

Areas affected by the message
Aids to Navigation - Georgian Bay, Trent-Severn Waterway - Calf Island
2025-05-17 13:17 UTC
NW-C-1158-25

Green spar buoy temporarily established in 44 48.668N 079 43.196W. 

Areas affected by the message
Aids to Navigation - Lake Simcoe, Trent-Severn Waterway - McRae Point
2025-04-28 18:05 UTC
NW-C-0781-25

Missing

Aids: Goffatt Island light buoy STA LL 1369.8
Showing results 1 to 13, from 13 total results.
Showing results 1 to 13, from 13 total results.
Details
Showing results 1 to 13, from 13 total results.
Showing results 1 to 13, from 13 total results.
ID Date Title Areas Charts Description
NW-C-0905-26
Areas affected by the message
42° 58.601'N 082° 24.212'W
2026-04-17 19:39 UTC Marine Communications and Traffic Services Centre Phone Line Outage Great Lakes 2400(NAD83)

Sarnia MCTS. Telephone line services inoperative at 171857 UTC Apr 2026. If unable to contact Sarnia MCTS, contact JRCC Trenton at 1-800-267-7270.
NW-C-0830-26
Areas affected by the message
45° 41.373'N 082° 27.639'W
Pt 1: 42° 04.465'N 084° 07.909'W
Pt 2: 45° 12.954'N 084° 30.256'W
Pt 3: 46° 49.564'N 089° 13.083'W
Pt 4: 47° 52.473'N 090° 36.148'W
Pt 5: 51° 04.260'N 089° 35.136'W
Pt 6: 50° 44.796'N 087° 14.430'W
Pt 7: 47° 14.637'N 082° 15.052'W
Pt 8: 47° 15.398'N 081° 08.961'W
Pt 9: 47° 47.004'N 079° 28.765'W
Pt 10: 47° 13.991'N 079° 02.076'W
Pt 11: 45° 51.776'N 074° 58.456'W
Pt 12: 45° 09.359'N 073° 41.831'W
Pt 13: 43° 53.154'N 074° 55.752'W
Pt 14: 42° 48.575'N 076° 12.614'W
Pt 15: 41° 13.528'N 081° 00.302'W
Pt 16: 40° 43.660'N 082° 04.392'W
Pt 17: 40° 40.664'N 082° 42.095'W
Pt 18: 40° 57.314'N 083° 29.506'W
Pt 19: 41° 09.129'N 083° 46.058'W
Pt 20: 41° 25.795'N 083° 57.714'W
2026-04-13 12:35 UTC Seasonal Buoy Program Great Lakes - Great Lakes 2400(NAD83)

The seasonal recommissioning of Canadian Coast Guard navigational buoys is underway in the Great Lakes sector.

Mariners requiring additional information are requested to contact the appropriate MCTS Centre, Navigational Warning Issuing Desk, or visit the Canadian Coast Guard Website at the following address: https://e-navigation.canada.ca
NW-C-0687-26
Areas affected by the message
44° 21.495'N 078° 17.394'W
44° 21.492'N 078° 17.404'W
44° 21.499'N 078° 17.384'W
44° 21.490'N 078° 17.408'W
Pt 1: 44° 21.490'N 078° 17.413'W
Pt 2: 44° 21.493'N 078° 17.405'W
Pt 3: 44° 21.492'N 078° 17.404'W
Pt 4: 44° 21.490'N 078° 17.403'W
Pt 5: 44° 21.488'N 078° 17.412'W
44° 21.500'N 078° 17.379'W
Pt 1: 44° 21.503'N 078° 17.376'W
Pt 2: 44° 21.500'N 078° 17.385'W
Pt 3: 44° 21.499'N 078° 17.384'W
Pt 4: 44° 21.497'N 078° 17.383'W
Pt 5: 44° 21.498'N 078° 17.375'W
Pt 6: 44° 21.500'N 078° 17.376'W
44° 21.495'N 078° 17.394'W
Pt 1: 44° 21.491'N 078° 17.404'W
Pt 2: 44° 21.498'N 078° 17.384'W
Pt 3: 44° 21.499'N 078° 17.384'W
Pt 4: 44° 21.492'N 078° 17.405'W
2026-03-29 23:01 UTC Bridge Horizontal Clearance Change Trent-Severn Waterway - Trent University 2023(NAD83), 2024(NAD83)

The horizontal clearance of the Faryon bridge at 44 21.495N 078 17.394W is reduced to 10.67 metres from 01 Nov to 30 Apr and 21.34 metres from 01 May to 31 Oct for bridge work. Scaffolding present on both sides of the bridge marked with flashing markers and yellow buoys. Barge 9 metres by 9 metres on site and lit.
NW-C-0178-26
Areas affected by the message
45° 47.000'N 082° 53.431'W
Pt 1: 42° 04.465'N 084° 07.909'W
Pt 2: 45° 12.954'N 084° 30.256'W
Pt 3: 46° 49.564'N 089° 13.083'W
Pt 4: 46° 17.159'N 090° 33.331'W
Pt 5: 46° 43.022'N 092° 30.665'W
Pt 6: 48° 01.587'N 091° 08.927'W
Pt 7: 51° 04.260'N 089° 35.136'W
Pt 8: 50° 44.796'N 087° 14.430'W
Pt 9: 47° 14.637'N 082° 15.052'W
Pt 10: 47° 15.398'N 081° 08.961'W
Pt 11: 47° 47.004'N 079° 28.765'W
Pt 12: 47° 13.991'N 079° 02.076'W
Pt 13: 45° 51.776'N 074° 58.456'W
Pt 14: 45° 18.672'N 073° 53.694'W
Pt 15: 45° 17.782'N 073° 53.103'W
Pt 16: 44° 55.770'N 073° 59.789'W
Pt 17: 43° 53.154'N 074° 55.752'W
Pt 18: 42° 48.575'N 076° 12.614'W
Pt 19: 41° 13.528'N 081° 00.302'W
Pt 20: 40° 43.660'N 082° 04.392'W
Pt 21: 40° 40.664'N 082° 42.095'W
Pt 22: 40° 57.314'N 083° 29.506'W
Pt 23: 41° 09.129'N 083° 46.058'W
Pt 24: 41° 25.795'N 083° 57.714'W
2026-02-12 14:36 UTC Aids to Navigation - Winter conditions Great Lakes 14970(NAD83)

Due to winter conditions, many buoys could be iced, laying on their sides, extinguished or burning at reduced intensity.

For more information, contact the appropriate MCTS center.

Cancels NW-C-0171-26 Cancels NW-C-0172-26
NW-C-3546-25
Areas affected by the message
Polyline
Pt 1: 44° 16.889'N 079° 30.979'W
Pt 2: 44° 16.875'N 079° 30.986'W
2025-11-17 15:11 UTC Obstruction Lake Simcoe, Trent-Severn Waterway - Little Cedar Point 2028(NAD83)

Subsurface scientific moorings temporarily established 3 metres below the surface at:

44 16.889N 079 30.979W
44 16.875N 079 30.986W
NW-C-3545-25
Areas affected by the message
Polyline
Pt 1: 44° 23.890'N 079° 34.297'W
Pt 2: 44° 23.880'N 079° 34.327'W
Polyline
Pt 1: 44° 23.928'N 079° 34.277'W
Pt 2: 44° 23.925'N 079° 34.308'W
2025-11-17 14:56 UTC Obstruction Lake Simcoe, Trent-Severn Waterway - Barrie 2028(NAD83)

Subsurface scientific mooring temporarily established at:

44 23.890N 079 34.297W
44 23.880N 079 34.327W, 3 metres below the surface.

44 23.928N 079 34.277W
44 23.925N 079 34.308W, 8 metres below the surface.
NW-C-3177-25
Areas affected by the message
46° 14.924'N 080° 23.813'W
Pt 1: 46° 16.296'N 080° 28.489'W
Pt 2: 46° 16.346'N 080° 19.268'W
Pt 3: 46° 13.442'N 080° 19.250'W
Pt 4: 46° 13.615'N 080° 28.489'W
2025-10-14 21:07 UTC Aids to Navigation Great Lakes, Lake Nipissing - West Arm 6038(NAD83)

Privately maintained navigational aids may be unreliable due to multiple buoys reported having discrepancies.
NW-C-2180-25
Areas affected by the message
44° 32.423'N 079° 21.108'W (Advertised position)
44° 32.412'N 079° 20.786'W (Reported position)
2025-07-19 16:29 UTC Aids to Navigation Lake Simcoe, Trent-Severn Waterway - Trout Shoal 2028(NAD83)

Off position, 400 metres west

Aids: Trout Shoal light buoy S323 LL 1371
NW-C-1622-25
Areas affected by the message
44° 32.276'N 078° 44.658'W
2025-06-13 17:38 UTC Aids to Navigation Trent-Severn Waterway - Fenelon Falls 2025(NAD83), 2025(NAD83)

Green spar buoy N21 temporarily established in 44 32.276N 078 44.658W. 
NW-C-1621-25
Areas affected by the message
44° 32.276'N 078° 44.659'W
2025-06-13 17:36 UTC Aids to Navigation Trent-Severn Waterway - Fenelon Falls 2025(NAD83), 2025(NAD83)

Temporarily removed. 

Aids: Fenelon River port daybeacon N21
NW-C-1499-25
Areas affected by the message
44° 36.257'N 079° 22.179'W
2025-06-05 17:32 UTC Obstruction Lake Simcoe, Trent-Severn Waterway - Atherly 2028(NAD83)

Subsurface scientific equipment placed 3 metres below the surface at 44 36.257N 079 22.179W
NW-C-1158-25
Areas affected by the message
44° 48.668'N 079° 43.196'W
2025-05-17 13:17 UTC Aids to Navigation Georgian Bay, Trent-Severn Waterway - Calf Island 2029(NAD83)

Green spar buoy temporarily established in 44 48.668N 079 43.196W. 
NW-C-0781-25
Areas affected by the message
44° 33.937'N 079° 21.955'W
2025-04-28 18:05 UTC Aids to Navigation Lake Simcoe, Trent-Severn Waterway - McRae Point 2028(NAD83)

Missing

Aids: Goffatt Island light buoy STA LL 1369.8
Showing results 1 to 13, from 13 total results.
Showing results 1 to 13, from 13 total results.
Table
Showing results 1 to 13, from 13 total results.
Showing results 1 to 13, from 13 total results.
ID Date Title Areas Charts Description
NW-C-0905-26 2026-04-17 19:39 UTC Marine Communications and Traffic Services Centre Phone Line Outage Great Lakes 2400(NAD83)

Sarnia MCTS. Telephone line services inoperative at 171857 UTC Apr 2026. If unable to contact Sarnia MCTS, contact JRCC Trenton at 1-800-267-7270.
NW-C-0830-26 2026-04-13 12:35 UTC Seasonal Buoy Program Great Lakes - Great Lakes 2400(NAD83)

The seasonal recommissioning of Canadian Coast Guard navigational buoys is underway in the Great Lakes sector.

Mariners requiring additional information are requested to contact the appropriate MCTS Centre, Navigational Warning Issuing Desk, or visit the Canadian Coast Guard Website at the following address: https://e-navigation.canada.ca
NW-C-0687-26 2026-03-29 23:01 UTC Bridge Horizontal Clearance Change Trent-Severn Waterway - Trent University 2023(NAD83), 2024(NAD83)

The horizontal clearance of the Faryon bridge at 44 21.495N 078 17.394W is reduced to 10.67 metres from 01 Nov to 30 Apr and 21.34 metres from 01 May to 31 Oct for bridge work. Scaffolding present on both sides of the bridge marked with flashing markers and yellow buoys. Barge 9 metres by 9 metres on site and lit.
NW-C-0178-26 2026-02-12 14:36 UTC Aids to Navigation - Winter conditions Great Lakes 14970(NAD83)

Due to winter conditions, many buoys could be iced, laying on their sides, extinguished or burning at reduced intensity.

For more information, contact the appropriate MCTS center.

Cancels NW-C-0171-26 Cancels NW-C-0172-26
NW-C-3546-25 2025-11-17 15:11 UTC Obstruction Lake Simcoe, Trent-Severn Waterway - Little Cedar Point 2028(NAD83)

Subsurface scientific moorings temporarily established 3 metres below the surface at:

44 16.889N 079 30.979W
44 16.875N 079 30.986W
NW-C-3545-25 2025-11-17 14:56 UTC Obstruction Lake Simcoe, Trent-Severn Waterway - Barrie 2028(NAD83)

Subsurface scientific mooring temporarily established at:

44 23.890N 079 34.297W
44 23.880N 079 34.327W, 3 metres below the surface.

44 23.928N 079 34.277W
44 23.925N 079 34.308W, 8 metres below the surface.
NW-C-3177-25 2025-10-14 21:07 UTC Aids to Navigation Great Lakes, Lake Nipissing - West Arm 6038(NAD83)

Privately maintained navigational aids may be unreliable due to multiple buoys reported having discrepancies.
NW-C-2180-25 2025-07-19 16:29 UTC Aids to Navigation Lake Simcoe, Trent-Severn Waterway - Trout Shoal 2028(NAD83)

Off position, 400 metres west

Aids: Trout Shoal light buoy S323 LL 1371
NW-C-1622-25 2025-06-13 17:38 UTC Aids to Navigation Trent-Severn Waterway - Fenelon Falls 2025(NAD83), 2025(NAD83)

Green spar buoy N21 temporarily established in 44 32.276N 078 44.658W. 
NW-C-1621-25 2025-06-13 17:36 UTC Aids to Navigation Trent-Severn Waterway - Fenelon Falls 2025(NAD83), 2025(NAD83)

Temporarily removed. 

Aids: Fenelon River port daybeacon N21
NW-C-1499-25 2025-06-05 17:32 UTC Obstruction Lake Simcoe, Trent-Severn Waterway - Atherly 2028(NAD83)

Subsurface scientific equipment placed 3 metres below the surface at 44 36.257N 079 22.179W
NW-C-1158-25 2025-05-17 13:17 UTC Aids to Navigation Georgian Bay, Trent-Severn Waterway - Calf Island 2029(NAD83)

Green spar buoy temporarily established in 44 48.668N 079 43.196W. 
NW-C-0781-25 2025-04-28 18:05 UTC Aids to Navigation Lake Simcoe, Trent-Severn Waterway - McRae Point 2028(NAD83)

Missing

Aids: Goffatt Island light buoy STA LL 1369.8
Showing results 1 to 13, from 13 total results.
Showing results 1 to 13, from 13 total results.
Compact
Showing results 1 to 13, from 13 total results.
Showing results 1 to 13, from 13 total results.
ID Date Charts Title
NW-C-0905-26 2026-04-17 19:39 UTC 2400(NAD83) Marine Communications and Traffic Services Centre Phone Line Outage

Sarnia MCTS. Telephone line services inoperative at 171857 UTC Apr 2026. If unable to contact Sarnia MCTS, contact JRCC Trenton at 1-800-267-7270.
NW-C-0830-26 2026-04-13 12:35 UTC 2400(NAD83) Seasonal Buoy Program

The seasonal recommissioning of Canadian Coast Guard navigational buoys is underway in the Great Lakes sector.

Mariners requiring additional information are requested to contact the appropriate MCTS Centre, Navigational Warning Issuing Desk, or visit the Canadian Coast Guard Website at the following address: https://e-navigation.canada.ca
NW-C-0687-26 2026-03-29 23:01 UTC 2023(NAD83), 2024(NAD83) Bridge Horizontal Clearance Change

The horizontal clearance of the Faryon bridge at 44 21.495N 078 17.394W is reduced to 10.67 metres from 01 Nov to 30 Apr and 21.34 metres from 01 May to 31 Oct for bridge work. Scaffolding present on both sides of the bridge marked with flashing markers and yellow buoys. Barge 9 metres by 9 metres on site and lit.
NW-C-0178-26 2026-02-12 14:36 UTC 14970(NAD83) Aids to Navigation - Winter conditions

Due to winter conditions, many buoys could be iced, laying on their sides, extinguished or burning at reduced intensity.

For more information, contact the appropriate MCTS center.

Cancels NW-C-0171-26 Cancels NW-C-0172-26
NW-C-3546-25 2025-11-17 15:11 UTC 2028(NAD83) Obstruction

Subsurface scientific moorings temporarily established 3 metres below the surface at:

44 16.889N 079 30.979W
44 16.875N 079 30.986W
NW-C-3545-25 2025-11-17 14:56 UTC 2028(NAD83) Obstruction

Subsurface scientific mooring temporarily established at:

44 23.890N 079 34.297W
44 23.880N 079 34.327W, 3 metres below the surface.

44 23.928N 079 34.277W
44 23.925N 079 34.308W, 8 metres below the surface.
NW-C-3177-25 2025-10-14 21:07 UTC 6038(NAD83) Aids to Navigation

Privately maintained navigational aids may be unreliable due to multiple buoys reported having discrepancies.
NW-C-2180-25 2025-07-19 16:29 UTC 2028(NAD83) Aids to Navigation

Off position, 400 metres west

Aids: Trout Shoal light buoy S323 LL 1371
NW-C-1622-25 2025-06-13 17:38 UTC 2025(NAD83), 2025(NAD83) Aids to Navigation

Green spar buoy N21 temporarily established in 44 32.276N 078 44.658W. 
NW-C-1621-25 2025-06-13 17:36 UTC 2025(NAD83), 2025(NAD83) Aids to Navigation

Temporarily removed. 

Aids: Fenelon River port daybeacon N21
NW-C-1499-25 2025-06-05 17:32 UTC 2028(NAD83) Obstruction

Subsurface scientific equipment placed 3 metres below the surface at 44 36.257N 079 22.179W
NW-C-1158-25 2025-05-17 13:17 UTC 2029(NAD83) Aids to Navigation

Green spar buoy temporarily established in 44 48.668N 079 43.196W. 
NW-C-0781-25 2025-04-28 18:05 UTC 2028(NAD83) Aids to Navigation

Missing

Aids: Goffatt Island light buoy STA LL 1369.8
Showing results 1 to 13, from 13 total results.
Showing results 1 to 13, from 13 total results.

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