Recorded chokepoint passages for Mark W. Barker, 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/mark-w-barker/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/detroit-river/2025-12/freighterlog:passage:368251670:2025-12-31T20:34:26ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 31 Dec 2025 15:34 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, 31 Dec 2025 20:34:26 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:368251670:2025-12-28T03:35:38ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 27 Dec 2025 22:35 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 28 Dec 2025 03:35:38 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:368251670:2025-12-27T20:40:28ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 27 Dec 2025 15:40 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 20:40:28 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:368251670:2025-12-24T23:45:30ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 24 Dec 2025 18:45 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 24 Dec 2025 23:45:30 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:368251670:2025-12-24T18:16:00ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 24 Dec 2025 13:16 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 18:16:00 GMThttps://freighterlog.com/log/welland/2025-12/freighterlog:passage:368251670:2025-12-23T19:53:01ZMark W. Barker (The Interlake Steamship Company) crossed Welland Canal (Thorold) upbound on 23 Dec 2025 14:53 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, 23 Dec 2025 19:53:01 GMThttps://freighterlog.com/log/welland/2025-12/freighterlog:passage:368251670:2025-12-20T19:15:43ZMark W. Barker (The Interlake Steamship Company) crossed Welland Canal (Thorold) downbound on 20 Dec 2025 14:15 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, 20 Dec 2025 19:15:43 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:368251670:2025-12-11T22:38:17ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 11 Dec 2025 17:38 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 11 Dec 2025 22:38:17 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:368251670:2025-12-11T17:17:21ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 11 Dec 2025 12:17 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 11 Dec 2025 17:17:21 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:368251670:2025-12-10T18:52:07ZMark W. Barker (The Interlake Steamship Company) crossed Straits of Mackinac eastbound on 10 Dec 2025 13:52 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, 10 Dec 2025 18:52:07 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:368251670:2025-12-07T17:58:45ZMark W. Barker (The Interlake Steamship Company) crossed Straits of Mackinac westbound on 7 Dec 2025 12:58 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 07 Dec 2025 17:58:45 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:368251670:2025-12-07T01:20:19ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 6 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.Sun, 07 Dec 2025 01:20:19 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:368251670:2025-12-06T19:13:56ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 6 Dec 2025 14:13 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, 06 Dec 2025 19:13:56 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:368251670:2025-12-02T11:37:59ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 2 Dec 2025 06:37 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 11:37:59 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:368251670:2025-12-02T06:19:54ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 2 Dec 2025 01:19 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 02 Dec 2025 06:19:54 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:368251670:2025-12-01T10:18:15ZMark W. Barker (The Interlake Steamship Company) crossed Straits of Mackinac eastbound on 1 Dec 2025 05:18 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 10:18:15 GMThttps://freighterlog.com/log/mackinac/2025-11/freighterlog:passage:368251670:2025-11-25T23:37:01ZMark W. Barker (The Interlake Steamship Company) crossed Straits of Mackinac westbound on 25 Nov 2025 18:37 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 23:37:01 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:368251670:2025-11-25T06:06:37ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 25 Nov 2025 01:06 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 06:06:37 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:368251670:2025-11-25T00:40:18ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 24 Nov 2025 19:40 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 00:40:18 GMThttps://freighterlog.com/log/welland/2025-11/freighterlog:passage:368251670:2025-11-23T09:21:49ZMark W. Barker (The Interlake Steamship Company) crossed Welland Canal (Thorold) upbound on 23 Nov 2025 04:21 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 23 Nov 2025 09:21:49 GMThttps://freighterlog.com/log/welland/2025-11/freighterlog:passage:368251670:2025-11-20T16:38:37ZMark W. Barker (The Interlake Steamship Company) crossed Welland Canal (Thorold) downbound on 20 Nov 2025 11:38 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 20 Nov 2025 16:38:37 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:368251670:2025-11-18T08:15:57ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 18 Nov 2025 03:15 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 18 Nov 2025 08:15:57 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:368251670:2025-11-18T02:01:21ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 17 Nov 2025 21:01 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 02:01:21 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:368251670:2025-11-15T10:15:19ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 15 Nov 2025 05:15 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, 15 Nov 2025 10:15:19 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:368251670:2025-11-15T03:39:50ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 14 Nov 2025 22:39 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 15 Nov 2025 03:39:50 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:368251670:2025-11-03T19:52:07ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 3 Nov 2025 14:52 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 03 Nov 2025 19:52:07 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:368251670:2025-11-03T14:11:29ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 3 Nov 2025 09:11 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, 03 Nov 2025 14:11:29 GMThttps://freighterlog.com/log/mackinac/2025-11/freighterlog:passage:368251670:2025-11-02T19:38:24ZMark W. Barker (The Interlake Steamship Company) crossed Straits of Mackinac eastbound on 2 Nov 2025 14:38 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 02 Nov 2025 19:38:24 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:368251670:2025-10-31T00:19:02ZMark W. Barker (The Interlake Steamship Company) crossed Straits of Mackinac westbound on 30 Oct 2025 20:19 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 00:19:02 GMThttps://freighterlog.com/log/port-huron/2025-10/freighterlog:passage:368251670:2025-10-30T06:41:27ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 30 Oct 2025 02:41 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 06:41:27 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:368251670:2025-10-30T01:06:31ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 29 Oct 2025 21:06 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 01:06:31 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:368251670:2025-10-28T01:52:26ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 27 Oct 2025 21:52 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, 28 Oct 2025 01:52:26 GMThttps://freighterlog.com/log/port-huron/2025-10/freighterlog:passage:368251670:2025-10-27T20:23:04ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 27 Oct 2025 16:23 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 20:23:04 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:368251670:2025-10-26T18:07:16ZMark W. Barker (The Interlake Steamship Company) crossed Straits of Mackinac eastbound on 26 Oct 2025 14:07 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, 26 Oct 2025 18:07:16 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:368251670:2025-10-24T01:41:03ZMark W. Barker (The Interlake Steamship Company) crossed Straits of Mackinac westbound on 23 Oct 2025 21:41 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, 24 Oct 2025 01:41:03 GMThttps://freighterlog.com/log/port-huron/2025-10/freighterlog:passage:368251670:2025-10-23T07:55:04ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 23 Oct 2025 03:55 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 23 Oct 2025 07:55:04 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:368251670:2025-10-23T02:12:58ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 22 Oct 2025 22:12 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, 23 Oct 2025 02:12:58 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:368251670:2025-10-19T22:32:34ZMark W. Barker (The Interlake Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 19 Oct 2025 18:32 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, 19 Oct 2025 22:32:34 GMThttps://freighterlog.com/log/port-huron/2025-10/freighterlog:passage:368251670:2025-10-19T17:11:48ZMark W. Barker (The Interlake Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 19 Oct 2025 13:11 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 19 Oct 2025 17:11:48 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:368251670:2025-10-18T23:00:48ZMark W. Barker (The Interlake Steamship Company) crossed Straits of Mackinac eastbound on 18 Oct 2025 19:00 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, 18 Oct 2025 23:00:48 GMT