Recorded chokepoint passages for Heemskerkgracht, 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/heemskerkgracht/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/2025-12/freighterlog:passage:244010871:2025-12-21T16:58:07ZHeemskerkgracht crossed Welland Canal (Thorold) downbound on 21 Dec 2025 11:58 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, 21 Dec 2025 16:58:07 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:244010871:2025-12-20T18:35:01ZHeemskerkgracht crossed Detroit River / Ambassador Bridge downbound on 20 Dec 2025 13:35 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 20 Dec 2025 18:35:01 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:244010871:2025-12-20T10:01:54ZHeemskerkgracht crossed Port Huron / Blue Water Bridge downbound on 20 Dec 2025 05:01 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 20 Dec 2025 10:01:54 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:244010871:2025-12-19T10:48:26ZHeemskerkgracht crossed Soo Locks (St. Marys River) downbound on 19 Dec 2025 05:48 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 10:48:26 GMThttps://freighterlog.com/log/soo/2025-12/freighterlog:passage:244010871:2025-12-03T22:05:16ZHeemskerkgracht crossed Soo Locks (St. Marys River) upbound on 3 Dec 2025 17:05 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, 03 Dec 2025 22:05:16 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:244010871:2025-12-02T22:39:34ZHeemskerkgracht crossed Port Huron / Blue Water Bridge upbound on 2 Dec 2025 17:39 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 02 Dec 2025 22:39:34 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:244010871:2025-12-02T16:37:26ZHeemskerkgracht crossed Detroit River / Ambassador Bridge upbound on 2 Dec 2025 11:37 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 16:37:26 GMThttps://freighterlog.com/log/welland/2025-12/freighterlog:passage:244010871:2025-12-01T19:37:19ZHeemskerkgracht crossed Welland Canal (Thorold) upbound on 1 Dec 2025 14:37 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 01 Dec 2025 19:37:19 GMThttps://freighterlog.com/log/welland/2025-07/freighterlog:passage:244010871:2025-07-26T14:43:27ZHeemskerkgracht crossed Welland Canal (Thorold) downbound on 26 Jul 2025 10:43 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 26 Jul 2025 14:43:27 GMThttps://freighterlog.com/log/welland/2025-07/freighterlog:passage:244010871:2025-07-22T09:38:32ZHeemskerkgracht crossed Welland Canal (Thorold) upbound on 22 Jul 2025 05:38 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, 22 Jul 2025 09:38:32 GMThttps://freighterlog.com/log/welland/2024-08/freighterlog:passage:244010871:2024-08-16T00:59:48ZHeemskerkgracht crossed Welland Canal (Thorold) downbound on 15 Aug 2024 20:59 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, 16 Aug 2024 00:59:48 GMThttps://freighterlog.com/log/detroit-river/2024-08/freighterlog:passage:244010871:2024-08-15T02:37:40ZHeemskerkgracht crossed Detroit River / Ambassador Bridge downbound on 14 Aug 2024 22:37 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 15 Aug 2024 02:37:40 GMThttps://freighterlog.com/log/port-huron/2024-08/freighterlog:passage:244010871:2024-08-14T19:06:46ZHeemskerkgracht crossed Port Huron / Blue Water Bridge downbound on 14 Aug 2024 15:06 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 14 Aug 2024 19:06:46 GMThttps://freighterlog.com/log/soo/2024-08/freighterlog:passage:244010871:2024-08-13T23:08:31ZHeemskerkgracht crossed Soo Locks (St. Marys River) downbound on 13 Aug 2024 19:08 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 13 Aug 2024 23:08:31 GMThttps://freighterlog.com/log/duluth-canal/2024-08/freighterlog:passage:244010871:2024-08-12T12:31:55ZHeemskerkgracht crossed Duluth Ship Canal outbound on 12 Aug 2024 07:31 CDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 12 Aug 2024 12:31:55 GMThttps://freighterlog.com/log/duluth-canal/2024-08/freighterlog:passage:244010871:2024-08-10T16:16:59ZHeemskerkgracht crossed Duluth Ship Canal inbound on 10 Aug 2024 11:16 CDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 10 Aug 2024 16:16:59 GMThttps://freighterlog.com/log/soo/2024-08/freighterlog:passage:244010871:2024-08-09T05:42:14ZHeemskerkgracht crossed Soo Locks (St. Marys River) upbound on 9 Aug 2024 01:42 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, 09 Aug 2024 05:42:14 GMThttps://freighterlog.com/log/port-huron/2024-08/freighterlog:passage:244010871:2024-08-08T10:19:41ZHeemskerkgracht crossed Port Huron / Blue Water Bridge upbound on 8 Aug 2024 06:19 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 08 Aug 2024 10:19:41 GMThttps://freighterlog.com/log/detroit-river/2024-08/freighterlog:passage:244010871:2024-08-08T05:03:23ZHeemskerkgracht crossed Detroit River / Ambassador Bridge upbound on 8 Aug 2024 01:03 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, 08 Aug 2024 05:03:23 GMThttps://freighterlog.com/log/welland/2024-08/freighterlog:passage:244010871:2024-08-07T09:04:08ZHeemskerkgracht crossed Welland Canal (Thorold) upbound on 7 Aug 2024 05:04 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, 07 Aug 2024 09:04:08 GMT