Recorded chokepoint passages for Lee A Tregurtha, 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/lee-a-tregurtha/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:366904950:2025-12-27T12:52:14ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac westbound on 27 Dec 2025 07:52 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 27 Dec 2025 12:52:14 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:366904950:2025-12-27T05:02:48ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) downbound on 27 Dec 2025 00:02 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 05:02:48 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:366904950:2025-12-25T04:35:48ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) upbound on 24 Dec 2025 23:35 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 25 Dec 2025 04:35:48 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:366904950:2025-12-24T16:08:09ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac eastbound on 24 Dec 2025 11:08 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, 24 Dec 2025 16:08:09 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:366904950:2025-12-21T13:09:23ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac westbound on 21 Dec 2025 08:09 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 21 Dec 2025 13:09:23 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:366904950:2025-12-18T12:56:11ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) downbound on 18 Dec 2025 07:56 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 18 Dec 2025 12:56:11 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:366904950:2025-12-14T22:24:14ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) upbound on 14 Dec 2025 17:24 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, 14 Dec 2025 22:24:14 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:366904950:2025-12-14T06:46:16ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac eastbound on 14 Dec 2025 01:46 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 14 Dec 2025 06:46:16 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:366904950:2025-12-10T22:57:14ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac westbound on 10 Dec 2025 17:57 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, 10 Dec 2025 22:57:14 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:366904950:2025-12-10T09:55:45ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) downbound on 10 Dec 2025 04:55 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, 10 Dec 2025 09:55:45 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:366904950:2025-12-08T04:42:58ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) upbound on 7 Dec 2025 23:42 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, 08 Dec 2025 04:42:58 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:366904950:2025-12-07T20:10:01ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac eastbound on 7 Dec 2025 15:10 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 07 Dec 2025 20:10:01 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:366904950:2025-12-04T01:42:42ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac westbound on 3 Dec 2025 20:42 EST. 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 Dec 2025 01:42:42 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:366904950:2025-12-03T17:51:58ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) downbound on 3 Dec 2025 12:51 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 17:51:58 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:366904950:2025-11-30T01:45:52ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) upbound on 29 Nov 2025 20:45 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, 30 Nov 2025 01:45:52 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:366904950:2025-11-29T03:13:17ZLee A Tregurtha (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 28 Nov 2025 22:13 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, 29 Nov 2025 03:13:17 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:366904950:2025-11-28T20:07:51ZLee A Tregurtha (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 28 Nov 2025 15:07 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 20:07:51 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:366904950:2025-11-25T22:08:55ZLee A Tregurtha (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 25 Nov 2025 17:08 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 22:08:55 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:366904950:2025-11-25T16:36:56ZLee A Tregurtha (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 25 Nov 2025 11:36 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 16:36:56 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:366904950:2025-11-24T20:17:00ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) downbound on 24 Nov 2025 15:17 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, 24 Nov 2025 20:17:00 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:366904950:2025-11-21T13:19:17ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) upbound on 21 Nov 2025 08:19 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, 21 Nov 2025 13:19:17 GMThttps://freighterlog.com/log/mackinac/2025-11/freighterlog:passage:366904950:2025-11-21T04:13:57ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac eastbound on 20 Nov 2025 23:13 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, 21 Nov 2025 04:13:57 GMThttps://freighterlog.com/log/mackinac/2025-11/freighterlog:passage:366904950:2025-11-18T13:38:32ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac westbound on 18 Nov 2025 08:38 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, 18 Nov 2025 13:38:32 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:366904950:2025-11-18T05:25:05ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) downbound on 18 Nov 2025 00:25 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 18 Nov 2025 05:25:05 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:366904950:2025-11-14T00:38:48ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) upbound on 13 Nov 2025 19:38 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 00:38:48 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:366904950:2025-11-11T08:55:23ZLee A Tregurtha (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 11 Nov 2025 03:55 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, 11 Nov 2025 08:55:23 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:366904950:2025-11-10T03:33:04ZLee A Tregurtha (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 9 Nov 2025 22:33 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, 10 Nov 2025 03:33:04 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:366904950:2025-11-07T13:58:36ZLee A Tregurtha (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 7 Nov 2025 08:58 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 13:58:36 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:366904950:2025-11-07T07:21:17ZLee A Tregurtha (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 7 Nov 2025 02:21 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 07:21:17 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:366904950:2025-11-05T16:14:24ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) downbound on 5 Nov 2025 11:14 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, 05 Nov 2025 16:14:24 GMThttps://freighterlog.com/log/superior-entry/2025-11/freighterlog:passage:366904950:2025-11-03T09:06:23ZLee A Tregurtha (The Interlake Steamship Company) crossed Superior Entry outbound on 3 Nov 2025 03:06 CST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 03 Nov 2025 09:06:23 GMThttps://freighterlog.com/log/duluth-canal/2025-11/freighterlog:passage:366904950:2025-11-02T07:39:34ZLee A Tregurtha (The Interlake Steamship Company) crossed Duluth Ship Canal inbound on 2 Nov 2025 01:39 CST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 02 Nov 2025 07:39:34 GMThttps://freighterlog.com/log/soo/2025-10/freighterlog:passage:366904950:2025-10-31T22:00:07ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) upbound on 31 Oct 2025 18:00 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 31 Oct 2025 22:00:07 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:366904950:2025-10-30T08:02:48ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac eastbound on 30 Oct 2025 04:02 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, 30 Oct 2025 08:02:48 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:366904950:2025-10-27T10:55:29ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac westbound on 27 Oct 2025 06:55 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, 27 Oct 2025 10:55:29 GMThttps://freighterlog.com/log/soo/2025-10/freighterlog:passage:366904950:2025-10-27T03:01:35ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) downbound on 26 Oct 2025 23:01 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, 27 Oct 2025 03:01:35 GMThttps://freighterlog.com/log/soo/2025-10/freighterlog:passage:366904950:2025-10-25T20:00:05ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) upbound on 25 Oct 2025 16:00 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 25 Oct 2025 20:00:05 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:366904950:2025-10-25T10:44:25ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac eastbound on 25 Oct 2025 06:44 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, 25 Oct 2025 10:44:25 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:366904950:2025-10-22T02:09:05ZLee A Tregurtha (The Interlake Steamship Company) crossed Straits of Mackinac westbound on 21 Oct 2025 22:09 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, 22 Oct 2025 02:09:05 GMThttps://freighterlog.com/log/soo/2025-10/freighterlog:passage:366904950:2025-10-21T17:17:43ZLee A Tregurtha (The Interlake Steamship Company) crossed Soo Locks (St. Marys River) downbound on 21 Oct 2025 13:17 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, 21 Oct 2025 17:17:43 GMT