Recorded chokepoint passages for American Century, 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/american-century/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:367121010:2025-12-28T08:44:53ZAmerican Century (American Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 28 Dec 2025 03:44 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 08:44:53 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:367121010:2025-12-28T02:52:35ZAmerican Century (American Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 27 Dec 2025 21:52 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, 28 Dec 2025 02:52:35 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:367121010:2025-12-27T03:40:45ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) downbound on 26 Dec 2025 22:40 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 03:40:45 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:367121010:2025-12-23T21:19:00ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) upbound on 23 Dec 2025 16:19 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, 23 Dec 2025 21:19:00 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:367121010:2025-12-23T12:13:20ZAmerican Century (American Steamship Company) crossed Straits of Mackinac eastbound on 23 Dec 2025 07:13 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 23 Dec 2025 12:13:20 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:367121010:2025-12-19T17:27:57ZAmerican Century (American Steamship Company) crossed Straits of Mackinac westbound on 19 Dec 2025 12:27 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, 19 Dec 2025 17:27:57 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:367121010:2025-12-19T06:21:26ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) downbound on 19 Dec 2025 01:21 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, 19 Dec 2025 06:21:26 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:367121010:2025-12-15T08:14:44ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) upbound on 15 Dec 2025 03:14 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 15 Dec 2025 08:14:44 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:367121010:2025-12-14T21:56:56ZAmerican Century (American Steamship Company) crossed Straits of Mackinac eastbound on 14 Dec 2025 16:56 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 14 Dec 2025 21:56:56 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:367121010:2025-12-08T23:35:25ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) downbound on 8 Dec 2025 18:35 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 08 Dec 2025 23:35:25 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:367121010:2025-12-05T14:51:50ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) upbound on 5 Dec 2025 09:51 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 05 Dec 2025 14:51:50 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:367121010:2025-12-04T14:05:20ZAmerican Century (American Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 4 Dec 2025 09:05 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 04 Dec 2025 14:05:20 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:367121010:2025-12-04T07:34:40ZAmerican Century (American Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 4 Dec 2025 02:34 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 04 Dec 2025 07:34:40 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:367121010:2025-12-01T17:41:53ZAmerican Century (American Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 1 Dec 2025 12:41 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 17:41:53 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:367121010:2025-11-30T05:27:00ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) downbound on 30 Nov 2025 00:27 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 05:27:00 GMThttps://freighterlog.com/log/duluth-canal/2025-11/freighterlog:passage:367121010:2025-11-28T19:27:08ZAmerican Century (American Steamship Company) crossed Duluth Ship Canal outbound on 28 Nov 2025 13:27 CST. 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 19:27:08 GMThttps://freighterlog.com/log/duluth-canal/2025-11/freighterlog:passage:367121010:2025-11-28T05:48:23ZAmerican Century (American Steamship Company) crossed Duluth Ship Canal inbound on 27 Nov 2025 23:48 CST. 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 05:48:23 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:367121010:2025-11-25T08:24:11ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) upbound on 25 Nov 2025 03:24 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 25 Nov 2025 08:24:11 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:367121010:2025-11-24T09:41:07ZAmerican Century (American Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 24 Nov 2025 04:41 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 09:41:07 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:367121010:2025-11-24T02:59:30ZAmerican Century (American Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 23 Nov 2025 21:59 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 02:59:30 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:367121010:2025-11-23T02:15:50ZAmerican Century (American Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 22 Nov 2025 21:15 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 23 Nov 2025 02:15:50 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:367121010:2025-11-21T09:23:44ZAmerican Century (American Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 21 Nov 2025 04:23 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 09:23:44 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:367121010:2025-11-20T10:21:48ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) downbound on 20 Nov 2025 05:21 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 20 Nov 2025 10:21:48 GMThttps://freighterlog.com/log/duluth-canal/2025-11/freighterlog:passage:367121010:2025-11-19T02:43:13ZAmerican Century (American Steamship Company) crossed Duluth Ship Canal outbound on 18 Nov 2025 20:43 CST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 19 Nov 2025 02:43:13 GMThttps://freighterlog.com/log/duluth-canal/2025-11/freighterlog:passage:367121010:2025-11-18T15:45:05ZAmerican Century (American Steamship Company) crossed Duluth Ship Canal inbound on 18 Nov 2025 09:45 CST. 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 15:45:05 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:367121010:2025-11-15T12:51:15ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) upbound on 15 Nov 2025 07:51 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 15 Nov 2025 12:51:15 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:367121010:2025-11-14T12:22:23ZAmerican Century (American Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 14 Nov 2025 07:22 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 12:22:23 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:367121010:2025-11-14T05:55:38ZAmerican Century (American Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 14 Nov 2025 00:55 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 14 Nov 2025 05:55:38 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:367121010:2025-11-13T00:08:30ZAmerican Century (American Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 12 Nov 2025 19:08 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 13 Nov 2025 00:08:30 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:367121010:2025-11-09T20:05:02ZAmerican Century (American Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 9 Nov 2025 15:05 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, 09 Nov 2025 20:05:02 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:367121010:2025-11-08T21:57:27ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) downbound on 8 Nov 2025 16:57 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 08 Nov 2025 21:57:27 GMThttps://freighterlog.com/log/duluth-canal/2025-11/freighterlog:passage:367121010:2025-11-07T04:38:40ZAmerican Century (American Steamship Company) crossed Duluth Ship Canal outbound on 6 Nov 2025 22:38 CST. 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 04:38:40 GMThttps://freighterlog.com/log/duluth-canal/2025-11/freighterlog:passage:367121010:2025-11-06T15:31:05ZAmerican Century (American Steamship Company) crossed Duluth Ship Canal inbound on 6 Nov 2025 09:31 CST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 06 Nov 2025 15:31:05 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:367121010:2025-11-05T09:05:48ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) upbound on 5 Nov 2025 04:05 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 05 Nov 2025 09:05:48 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:367121010:2025-11-04T10:34:38ZAmerican Century (American Steamship Company) crossed Port Huron / Blue Water Bridge upbound on 4 Nov 2025 05:34 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 04 Nov 2025 10:34:38 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:367121010:2025-11-04T04:25:26ZAmerican Century (American Steamship Company) crossed Detroit River / Ambassador Bridge upbound on 3 Nov 2025 23:25 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, 04 Nov 2025 04:25:26 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:367121010:2025-11-02T11:25:34ZAmerican Century (American Steamship Company) crossed Detroit River / Ambassador Bridge downbound on 2 Nov 2025 06:25 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 02 Nov 2025 11:25:34 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:367121010:2025-11-02T05:12:55ZAmerican Century (American Steamship Company) crossed Port Huron / Blue Water Bridge downbound on 2 Nov 2025 01:12 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 02 Nov 2025 05:12:55 GMThttps://freighterlog.com/log/soo/2025-11/freighterlog:passage:367121010:2025-11-01T07:08:29ZAmerican Century (American Steamship Company) crossed Soo Locks (St. Marys River) downbound on 1 Nov 2025 03:08 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 01 Nov 2025 07:08:29 GMThttps://freighterlog.com/log/superior-entry/2025-10/freighterlog:passage:367121010:2025-10-30T20:43:52ZAmerican Century (American Steamship Company) crossed Superior Entry outbound on 30 Oct 2025 15:43 CDT. 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 20:43:52 GMT