Recorded chokepoint passages for Thunder Bay, newest first. The record, not the map: this feed carries passages already in the archive, which ends at December 2025. Vessel data derived from the Nationwide Automatic Identification System (NOAA Office for Coastal Management, marinecadastre.gov), CC0.https://freighterlog.com/vessels/thunder-bay/en-usVessel data derived from the Nationwide Automatic Identification System (NOAA Office for Coastal Management, marinecadastre.gov), CC0. Transit and lock data from the St. Lawrence Seaway Management Corporation / Saint Lawrence Seaway Development Corporation public vessel-transit table (seaway-greatlakes.com).Wed, 23 Sep 2026 18:23:30 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:316023339:2025-12-28T20:45:15ZThunder Bay (Canada Steamship Lines) crossed Straits of Mackinac westbound on 28 Dec 2025 15:45 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 28 Dec 2025 20:45:15 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:316023339:2025-12-28T04:05:13ZThunder Bay (Canada Steamship Lines) crossed Port Huron / Blue Water Bridge upbound on 27 Dec 2025 23:05 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 28 Dec 2025 04:05:13 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:316023339:2025-12-27T22:15:51ZThunder Bay (Canada Steamship Lines) crossed Detroit River / Ambassador Bridge upbound on 27 Dec 2025 17:15 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 27 Dec 2025 22:15:51 GMThttps://freighterlog.com/log/welland/2025-12/freighterlog:passage:316023339:2025-12-26T01:20:32ZThunder Bay (Canada Steamship Lines) crossed Welland Canal (Thorold) upbound on 25 Dec 2025 20:20 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 26 Dec 2025 01:20:32 GMThttps://freighterlog.com/log/welland/2025-12/freighterlog:passage:316023339:2025-12-03T23:39:59ZThunder Bay (Canada Steamship Lines) crossed Welland Canal (Thorold) downbound on 3 Dec 2025 18:39 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 03 Dec 2025 23:39:59 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:316023339:2025-12-03T02:25:07ZThunder Bay (Canada Steamship Lines) crossed Detroit River / Ambassador Bridge downbound on 2 Dec 2025 21:25 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 03 Dec 2025 02:25:07 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:316023339:2025-12-02T20:46:21ZThunder Bay (Canada Steamship Lines) crossed Port Huron / Blue Water Bridge downbound on 2 Dec 2025 15:46 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 02 Dec 2025 20:46:21 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:316023339:2025-12-01T23:04:03ZThunder Bay (Canada Steamship Lines) crossed Soo Locks (St. Marys River) downbound on 1 Dec 2025 18:04 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 01 Dec 2025 23:04:03 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:316023339:2025-11-28T14:09:43ZThunder Bay (Canada Steamship Lines) crossed Soo Locks (St. Marys River) upbound on 28 Nov 2025 09:09 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 28 Nov 2025 14:09:43 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:316023339:2025-11-26T04:52:14ZThunder Bay (Canada Steamship Lines) crossed Detroit River / Ambassador Bridge upbound on 25 Nov 2025 23:52 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 26 Nov 2025 04:52:14 GMThttps://freighterlog.com/log/welland/2025-11/freighterlog:passage:316023339:2025-11-25T01:06:47ZThunder Bay (Canada Steamship Lines) crossed Welland Canal (Thorold) upbound on 24 Nov 2025 20:06 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 25 Nov 2025 01:06:47 GMThttps://freighterlog.com/log/welland/2025-11/freighterlog:passage:316023339:2025-11-16T13:52:03ZThunder Bay (Canada Steamship Lines) crossed Welland Canal (Thorold) downbound on 16 Nov 2025 08:52 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 16 Nov 2025 13:52:03 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:316023339:2025-11-15T12:09:29ZThunder Bay (Canada Steamship Lines) crossed Detroit River / Ambassador Bridge downbound on 15 Nov 2025 07:09 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 15 Nov 2025 12:09:29 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:316023339:2025-11-15T05:56:56ZThunder Bay (Canada Steamship Lines) crossed Port Huron / Blue Water Bridge downbound on 15 Nov 2025 00:56 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 15 Nov 2025 05:56:56 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:316023339:2025-11-14T07:31:53ZThunder Bay (Canada Steamship Lines) crossed Soo Locks (St. Marys River) downbound on 14 Nov 2025 02:31 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 14 Nov 2025 07:31:53 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:316023339:2025-11-09T10:50:31ZThunder Bay (Canada Steamship Lines) crossed Soo Locks (St. Marys River) upbound on 9 Nov 2025 05:50 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 09 Nov 2025 10:50:31 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:316023339:2025-11-08T14:10:36ZThunder Bay (Canada Steamship Lines) crossed Port Huron / Blue Water Bridge upbound on 8 Nov 2025 09:10 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 08 Nov 2025 14:10:36 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:316023339:2025-11-08T04:43:22ZThunder Bay (Canada Steamship Lines) crossed Detroit River / Ambassador Bridge upbound on 7 Nov 2025 23:43 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 08 Nov 2025 04:43:22 GMThttps://freighterlog.com/log/welland/2025-11/freighterlog:passage:316023339:2025-11-07T06:26:56ZThunder Bay (Canada Steamship Lines) crossed Welland Canal (Thorold) upbound on 7 Nov 2025 01:26 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 07 Nov 2025 06:26:56 GMThttps://freighterlog.com/log/welland/2025-10/freighterlog:passage:316023339:2025-10-06T17:28:45ZThunder Bay (Canada Steamship Lines) crossed Welland Canal (Thorold) downbound on 6 Oct 2025 13:28 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 06 Oct 2025 17:28:45 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:316023339:2025-10-05T20:58:33ZThunder Bay (Canada Steamship Lines) crossed Detroit River / Ambassador Bridge downbound on 5 Oct 2025 16:58 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 05 Oct 2025 20:58:33 GMThttps://freighterlog.com/log/port-huron/2025-10/freighterlog:passage:316023339:2025-10-05T15:24:53ZThunder Bay (Canada Steamship Lines) crossed Port Huron / Blue Water Bridge downbound on 5 Oct 2025 11:24 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 05 Oct 2025 15:24:53 GMThttps://freighterlog.com/log/soo/2025-10/freighterlog:passage:316023339:2025-10-04T19:28:12ZThunder Bay (Canada Steamship Lines) crossed Soo Locks (St. Marys River) downbound on 4 Oct 2025 15:28 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 04 Oct 2025 19:28:12 GMThttps://freighterlog.com/log/soo/2025-09/freighterlog:passage:316023339:2025-09-30T04:00:51ZThunder Bay (Canada Steamship Lines) crossed Soo Locks (St. Marys River) upbound on 30 Sep 2025 00:00 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 30 Sep 2025 04:00:51 GMThttps://freighterlog.com/log/port-huron/2025-09/freighterlog:passage:316023339:2025-09-29T05:05:48ZThunder Bay (Canada Steamship Lines) crossed Port Huron / Blue Water Bridge upbound on 29 Sep 2025 01:05 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 29 Sep 2025 05:05:48 GMThttps://freighterlog.com/log/detroit-river/2025-09/freighterlog:passage:316023339:2025-09-28T23:07:10ZThunder Bay (Canada Steamship Lines) crossed Detroit River / Ambassador Bridge upbound on 28 Sep 2025 19:07 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 28 Sep 2025 23:07:10 GMThttps://freighterlog.com/log/welland/2025-09/freighterlog:passage:316023339:2025-09-28T00:20:06ZThunder Bay (Canada Steamship Lines) crossed Welland Canal (Thorold) upbound on 27 Sep 2025 20:20 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 28 Sep 2025 00:20:06 GMThttps://freighterlog.com/log/welland/2025-09/freighterlog:passage:316023339:2025-09-22T03:11:46ZThunder Bay (Canada Steamship Lines) crossed Welland Canal (Thorold) downbound on 21 Sep 2025 23:11 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 22 Sep 2025 03:11:46 GMThttps://freighterlog.com/log/detroit-river/2025-09/freighterlog:passage:316023339:2025-09-21T04:24:13ZThunder Bay (Canada Steamship Lines) crossed Detroit River / Ambassador Bridge downbound on 21 Sep 2025 00:24 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 21 Sep 2025 04:24:13 GMThttps://freighterlog.com/log/port-huron/2025-09/freighterlog:passage:316023339:2025-09-20T22:15:03ZThunder Bay (Canada Steamship Lines) crossed Port Huron / Blue Water Bridge downbound on 20 Sep 2025 18:15 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 20 Sep 2025 22:15:03 GMThttps://freighterlog.com/log/soo/2025-09/freighterlog:passage:316023339:2025-09-20T00:46:45ZThunder Bay (Canada Steamship Lines) crossed Soo Locks (St. Marys River) downbound on 19 Sep 2025 20:46 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 20 Sep 2025 00:46:45 GMThttps://freighterlog.com/log/soo/2025-09/freighterlog:passage:316023339:2025-09-16T22:51:24ZThunder Bay (Canada Steamship Lines) crossed Soo Locks (St. Marys River) upbound on 16 Sep 2025 18:51 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 16 Sep 2025 22:51:24 GMThttps://freighterlog.com/log/port-huron/2025-09/freighterlog:passage:316023339:2025-09-15T23:56:56ZThunder Bay (Canada Steamship Lines) crossed Port Huron / Blue Water Bridge upbound on 15 Sep 2025 19:56 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 15 Sep 2025 23:56:56 GMThttps://freighterlog.com/log/detroit-river/2025-09/freighterlog:passage:316023339:2025-09-15T15:08:30ZThunder Bay (Canada Steamship Lines) crossed Detroit River / Ambassador Bridge upbound on 15 Sep 2025 11:08 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 15 Sep 2025 15:08:30 GMThttps://freighterlog.com/log/welland/2025-09/freighterlog:passage:316023339:2025-09-14T15:37:39ZThunder Bay (Canada Steamship Lines) crossed Welland Canal (Thorold) upbound on 14 Sep 2025 11:37 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 14 Sep 2025 15:37:39 GMThttps://freighterlog.com/log/welland/2025-09/freighterlog:passage:316023339:2025-09-04T13:16:54ZThunder Bay (Canada Steamship Lines) crossed Welland Canal (Thorold) downbound on 4 Sep 2025 09:16 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 04 Sep 2025 13:16:54 GMThttps://freighterlog.com/log/detroit-river/2025-09/freighterlog:passage:316023339:2025-09-03T14:37:29ZThunder Bay (Canada Steamship Lines) crossed Detroit River / Ambassador Bridge downbound on 3 Sep 2025 10:37 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 03 Sep 2025 14:37:29 GMThttps://freighterlog.com/log/port-huron/2025-09/freighterlog:passage:316023339:2025-09-03T08:37:01ZThunder Bay (Canada Steamship Lines) crossed Port Huron / Blue Water Bridge downbound on 3 Sep 2025 04:37 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 03 Sep 2025 08:37:01 GMThttps://freighterlog.com/log/mackinac/2025-09/freighterlog:passage:316023339:2025-09-02T12:13:51ZThunder Bay (Canada Steamship Lines) crossed Straits of Mackinac eastbound on 2 Sep 2025 08:13 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 02 Sep 2025 12:13:51 GMThttps://freighterlog.com/log/mackinac/2025-08/freighterlog:passage:316023339:2025-08-27T14:34:40ZThunder Bay (Canada Steamship Lines) crossed Straits of Mackinac westbound on 27 Aug 2025 10:34 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 27 Aug 2025 14:34:40 GMT