Choose the likely corridor
Use the Soo, Mackinac, Duluth, Port Huron, Detroit, or Saginaw shortcut. If you only know the vessel name, begin with the lake-wide view.
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Current vessel movements, port activity, lake levels, and marine weather.
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Live Great Lakes Ship Map
Start with all five lakes or jump directly to a major vessel corridor. The map recenters without sending you through a maze of separate pages.
AIS vessel positions
Choose a Great Lakes corridor
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Current map: All Great Lakes
All Great Lakes
The lake-wide view shows AIS-equipped traffic across all five Great Lakes. Zoom in or choose a corridor for a faster read on a known commercial route.
Start here when you do not know which lake a vessel is on. For named passage activity, open BoatNerd's lake-wide map.
AIS positions are informational, may be delayed or incomplete, and must not be used for navigation. Embedded map provided through MyShipTracking's public map widget. Passage links open BoatNerd AIS. NOAA observations are nearby context, not conditions aboard a vessel.
No AIS key exposedThe vessel layer stays inside the map provider's supported public embed.
No copied ship scheduleNamed passage lists remain with BoatNerd instead of being scraped or republished here.
Useful if live data failsCorridor explanations, watching locations, and source links remain crawlable and available.
How to Find a Freighter
The fastest workflow uses the map for location and the passage list for confirmation.
Tap the vessel marker
The map provider may show the ship name, reported destination, speed, course, and last AIS update. Treat those as reports, not guarantees.
Confirm recent passage activity
Open the matching BoatNerd passage list. For Soo Locks timing, also use the official hotline and the dedicated Soo Locks tool.
Great Lakes Shipping Corridors
These are the chokepoints and port approaches where a lake-wide map becomes most useful for shoreside watching.
Soo Locks
Commercial traffic moving between Lake Superior and the lower lakes funnels through the St. Marys River and lock complex.
Straits of Mackinac
The Straits concentrate traffic moving between northern Lake Michigan and Lake Huron, with shore views from both peninsulas.
Duluth–Superior
The harbor and lift bridge approach make vessel arrivals visible and easy to pair with a dedicated passage list.
Port Huron
The upper St. Clair River carries vessels close to shore immediately south of Lake Huron and the Blue Water Bridge.
Detroit River
Lake traffic passes through a busy international and industrial river corridor, with broad public views from Belle Isle.
Saginaw Bay
Freighters serving Bay City and Saginaw follow the river and dredged bay channel. Traffic is less constant, so live tracking matters.
What AIS Actually Shows
Automatic Identification System broadcasts can include a vessel's identity, position, course, and speed. The Great Lakes–St. Lawrence Seaway requires AIS on commercial vessels in its traffic sectors and uses that information for traffic management. Public websites receive and display portions of that traffic through shore-based receiver networks.
That distinction matters. A ship can stop updating publicly because it is outside receiver range, because the public feed is delayed, or because a provider is having trouble. A missing marker does not prove an empty lake.
For technical background, read the Great Lakes–St. Lawrence Seaway AIS explanation. For official lock status and visitor planning, use the Soo Locks live tool.
What Kind of Ship Am I Seeing?
Three broad groups explain most of the large commercial traffic visible on a Great Lakes vessel map.
Lakers
Bulk carriers built primarily for Great Lakes service. Many have self-unloading booms and carry iron ore, limestone, coal, salt, or grain.
Salties
Ocean-going ships sized to transit the St. Lawrence Seaway. They connect inland ports with international routes.
Tugs and barges
Smaller commercial units that move bulk cargo, construction material, fuel, or specialized loads through rivers and ports.
Great Lakes Ship Tracking FAQ
How do I track Great Lakes freighters live?
Start with the live AIS ship map on this page, which covers all five Great Lakes, then narrow to the corridor where the ship you want is likely to be: the Soo Locks, the Straits of Mackinac, Duluth-Superior, Port Huron, the Detroit River or Saginaw Bay. Tap a vessel marker or name and the map provider may show the ship's name, reported destination, speed, course and the time of its last AIS update. Check that timestamp first, because a marker is only as current as its last broadcast. For recent named-ship activity, open the matching BoatNerd passage list for that corridor, which records arrivals and departures instead of live positions. Public AIS coverage can be delayed or incomplete, so pair the map with a passage list when timing matters, and treat every position as a shoreside watching aid rather than navigation data. If the embedded map fails to load, the BoatNerd and MyShipTracking links still work.
Does every Great Lakes ship appear on AIS?
No. Most large commercial vessels people follow transmit AIS, but public receiver and provider coverage can be delayed or incomplete. Small recreational boats may not carry AIS at all.
Can I see which ships are going through the Soo Locks today?
Yes. Choose the Soo Locks corridor on the live map to see AIS-equipped vessels approaching, waiting at and leaving the locks at Sault Ste. Marie, then open the dedicated Soo Locks schedule-today flow on this site. That page combines the live map with the BoatNerd Soo Locks passage list, which records each named ship as it locks through, and the official U.S. Army Corps of Engineers vessel hotline. Use the three together: the map shows where ships are right now, the passage list confirms which ones have already gone through, and the hotline is the Corps' own statement of what is expected. Because public AIS can lag or drop out, a ship that appears stopped on the map may already be in the chamber, and the passage list settles it. If you want to watch in person, the Soo Locks observation deck is the best public vantage point on the system.
Where can I watch freighters from shore?
Strong public options include the Soo Locks observation deck at Sault Ste. Marie, where ships pass within a short walk of the viewing platform; Canal Park in Duluth, where the harbor and aerial lift bridge approach make arrivals easy to see and easy to pair with a passage list; Vantage Point in Port Huron on the St. Clair River, where the upper river funnels Lake Huron traffic past the waterfront; the Mackinaw City and St. Ignace waterfronts on either side of the Straits of Mackinac; Belle Isle on the Detroit River, with broad views of a busy international and industrial corridor; and Bay City's Saginaw River waterfront for the Saginaw Bay run. Each of these sits on a corridor the live map can be set to, so you can confirm a ship is actually inbound before you drive. Pair the corridor view with the matching BoatNerd passage list to see what has already passed and when.
What is the difference between a laker and a saltie?
A laker is designed mainly for Great Lakes service. A saltie is an ocean-going vessel able to reach the lakes through the St. Lawrence Seaway. Thousand-foot lakers are too large for the Seaway locks.
Is this live ship map safe to use for navigation?
No. It is a shoreside watching and trip-planning tool. AIS positions may be delayed or incomplete. Mariners should use official charts, notices, navigation equipment, and required procedures.