Recorded chokepoint passages for Roerborg, 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/roerborg/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/welland/2025-08/freighterlog:passage:244820055:2025-08-17T20:07:17ZRoerborg crossed Welland Canal (Thorold) downbound on 17 Aug 2025 16:07 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, 17 Aug 2025 20:07:17 GMThttps://freighterlog.com/log/detroit-river/2025-08/freighterlog:passage:244820055:2025-08-16T22:52:25ZRoerborg crossed Detroit River / Ambassador Bridge downbound on 16 Aug 2025 18:52 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 16 Aug 2025 22:52:25 GMThttps://freighterlog.com/log/port-huron/2025-08/freighterlog:passage:244820055:2025-08-16T17:25:03ZRoerborg crossed Port Huron / Blue Water Bridge downbound on 16 Aug 2025 13:25 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, 16 Aug 2025 17:25:03 GMThttps://freighterlog.com/log/soo/2025-08/freighterlog:passage:244820055:2025-08-15T19:51:09ZRoerborg crossed Soo Locks (St. Marys River) downbound on 15 Aug 2025 15:51 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 15 Aug 2025 19:51:09 GMThttps://freighterlog.com/log/soo/2025-08/freighterlog:passage:244820055:2025-08-11T13:08:55ZRoerborg crossed Soo Locks (St. Marys River) upbound on 11 Aug 2025 09:08 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, 11 Aug 2025 13:08:55 GMThttps://freighterlog.com/log/mackinac/2025-08/freighterlog:passage:244820055:2025-08-11T03:43:37ZRoerborg crossed Straits of Mackinac eastbound on 10 Aug 2025 23:43 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, 11 Aug 2025 03:43:37 GMThttps://freighterlog.com/log/mackinac/2025-08/freighterlog:passage:244820055:2025-08-03T12:34:48ZRoerborg crossed Straits of Mackinac westbound on 3 Aug 2025 08:34 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 03 Aug 2025 12:34:48 GMThttps://freighterlog.com/log/port-huron/2025-08/freighterlog:passage:244820055:2025-08-02T17:37:35ZRoerborg crossed Port Huron / Blue Water Bridge upbound on 2 Aug 2025 13:37 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 02 Aug 2025 17:37:35 GMThttps://freighterlog.com/log/detroit-river/2025-08/freighterlog:passage:244820055:2025-08-02T11:25:52ZRoerborg crossed Detroit River / Ambassador Bridge upbound on 2 Aug 2025 07:25 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, 02 Aug 2025 11:25:52 GMT