Fleet-matched vessel · Canada flag
Robert S Pierson
Algoma Central · Self-unloader · 192 m. Range: Lakes only. 384 recorded passages across 7 chokepoints.
Last recorded passage
upbound at Detroit River / Ambassador Bridge
29 Dec 2025, 23:37 EST — ±15 min · see the December 2025 log
This is an archive, not a tracker. The passage record runs January 2024 to December 2025 and ends at 31 Dec 2025. The public AIS archive arrives in quarterly batches and currently runs nine months behind. Nothing on this page tells you where Robert S Pierson is today. Her last recorded passage was 2 days before the archive ends, and that gap is about the record, not necessarily about the ship.
FreighterLog is the record, not the map. For where Robert S Pierson is right now, see BoatNerd's live AIS map, which runs on their own receivers on the lakes, or VesselFinder.
Follow by RSS. Every crossing Robert S Pierson makes goes into a feed of her own, added when the next batch of the public AIS archive is processed. It is a file on this domain: no account, no email address, and nothing that reports back. Robert S Pierson feed · all chokepoints
Specification
| Name (AIS) | ROBERT S PIERSON |
|---|---|
| MMSI | 316011905 |
| IMO | IMO7366403 |
| Call sign | CFN4934 |
| Length overall | 192 m (630 ft) |
| Beam | 21 m (69 ft) |
| AIS vessel type | Cargo - No additional information |
| Hull type | Self-unloader |
| Operator | Algoma Central |
| Flag | Canada |
Passage record
- 384 Passages January 2024 – December 2025
- 7 Chokepoints of 7 monitored
- 6 Jan 2024 First in archive UTC date
- 30 Dec 2025 Last in archive UTC date
Where she was recorded
Season passage log
Local time at each chokepoint · grouped by month (UTC buckets)
Times are interpolated from AIS track samples, good to about fifteen minutes, and shown in each chokepoint's local time. A passage is a track crossing our gate line, not an official lock record.
2025 season
December 2025 21 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 29 Dec 2025 | 23:37 EST | Detroit River / Ambassador Bridge | upbound |
| 25 Dec 2025 | 20:26 EST | Detroit River / Ambassador Bridge | downbound |
| 25 Dec 2025 | 14:41 EST | Port Huron / Blue Water Bridge | downbound |
| 24 Dec 2025 | 18:57 EST | Soo Locks (St. Marys River) | downbound |
| 19 Dec 2025 | 15:33 EST | Soo Locks (St. Marys River) | upbound |
| 17 Dec 2025 | 23:41 EST | Port Huron / Blue Water Bridge | upbound |
| 17 Dec 2025 | 11:13 EST | Port Huron / Blue Water Bridge | downbound |
| 14 Dec 2025 | 21:36 EST | Port Huron / Blue Water Bridge | upbound |
| 14 Dec 2025 | 10:41 EST | Port Huron / Blue Water Bridge | downbound |
| 12 Dec 2025 | 18:16 EST | Port Huron / Blue Water Bridge | upbound |
| 12 Dec 2025 | 10:43 EST | Detroit River / Ambassador Bridge | upbound |
| 11 Dec 2025 | 17:04 EST | Port Huron / Blue Water Bridge | downbound |
| 9 Dec 2025 | 05:18 EST | Port Huron / Blue Water Bridge | upbound |
| 8 Dec 2025 | 23:57 EST | Detroit River / Ambassador Bridge | upbound |
| 8 Dec 2025 | 18:28 EST | Detroit River / Ambassador Bridge | downbound |
| 8 Dec 2025 | 05:24 EST | Port Huron / Blue Water Bridge | downbound |
| 6 Dec 2025 | 12:30 EST | Port Huron / Blue Water Bridge | upbound |
| 6 Dec 2025 | 01:18 EST | Port Huron / Blue Water Bridge | downbound |
| 4 Dec 2025 | 11:10 EST | Port Huron / Blue Water Bridge | upbound |
| 3 Dec 2025 | 21:14 EST | Port Huron / Blue Water Bridge | downbound |
| 1 Dec 2025 | 03:42 EST | Port Huron / Blue Water Bridge | upbound |
November 2025 19 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 30 Nov 2025 | 08:26 EST | Detroit River / Ambassador Bridge | upbound |
| 27 Nov 2025 | 12:16 EST | Detroit River / Ambassador Bridge | downbound |
| 26 Nov 2025 | 18:34 EST | Detroit River / Ambassador Bridge | upbound |
| 26 Nov 2025 | 12:51 EST | Detroit River / Ambassador Bridge | downbound |
| 23 Nov 2025 | 21:42 EST | Port Huron / Blue Water Bridge | upbound |
| 23 Nov 2025 | 09:31 EST | Port Huron / Blue Water Bridge | downbound |
| 22 Nov 2025 | 06:48 EST | Straits of Mackinac | eastbound |
| 20 Nov 2025 | 00:09 EST | Straits of Mackinac | westbound |
| 15 Nov 2025 | 08:57 EST | Straits of Mackinac | westbound |
| 15 Nov 2025 | 01:15 EST | Soo Locks (St. Marys River) | downbound |
| 13 Nov 2025 | 23:35 EST | Soo Locks (St. Marys River) | upbound |
| 13 Nov 2025 | 01:59 EST | Port Huron / Blue Water Bridge | upbound |
| 12 Nov 2025 | 15:56 EST | Detroit River / Ambassador Bridge | upbound |
| 12 Nov 2025 | 12:47 EST | Detroit River / Ambassador Bridge | upbound |
| 12 Nov 2025 | 06:56 EST | Port Huron / Blue Water Bridge | downbound |
| 9 Nov 2025 | 13:17 EST | Port Huron / Blue Water Bridge | upbound |
| 8 Nov 2025 | 19:32 EST | Detroit River / Ambassador Bridge | upbound |
| 6 Nov 2025 | 07:00 EST | Welland Canal (Thorold) | upbound |
| 5 Nov 2025 | 01:51 EST | Welland Canal (Thorold) | downbound |
October 2025 24 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 31 Oct 2025 | 13:26 EDT | Detroit River / Ambassador Bridge | downbound |
| 31 Oct 2025 | 01:08 EDT | Port Huron / Blue Water Bridge | downbound |
| 29 Oct 2025 | 17:39 EDT | Straits of Mackinac | eastbound |
| 28 Oct 2025 | 05:46 EDT | Straits of Mackinac | westbound |
| 25 Oct 2025 | 15:27 EDT | Detroit River / Ambassador Bridge | downbound |
| 24 Oct 2025 | 07:35 EDT | Detroit River / Ambassador Bridge | downbound |
| 23 Oct 2025 | 18:24 EDT | Port Huron / Blue Water Bridge | downbound |
| 21 Oct 2025 | 23:57 EDT | Port Huron / Blue Water Bridge | upbound |
| 21 Oct 2025 | 18:25 EDT | Detroit River / Ambassador Bridge | upbound |
| 19 Oct 2025 | 18:46 EDT | Welland Canal (Thorold) | upbound |
| 18 Oct 2025 | 11:26 EDT | Welland Canal (Thorold) | downbound |
| 16 Oct 2025 | 12:04 EDT | Detroit River / Ambassador Bridge | downbound |
| 16 Oct 2025 | 06:46 EDT | Port Huron / Blue Water Bridge | downbound |
| 14 Oct 2025 | 13:02 EDT | Port Huron / Blue Water Bridge | upbound |
| 14 Oct 2025 | 07:32 EDT | Port Huron / Blue Water Bridge | downbound |
| 12 Oct 2025 | 12:55 EDT | Port Huron / Blue Water Bridge | upbound |
| 12 Oct 2025 | 00:00 EDT | Detroit River / Ambassador Bridge | upbound |
| 9 Oct 2025 | 18:35 EDT | Detroit River / Ambassador Bridge | upbound |
| 9 Oct 2025 | 12:38 EDT | Port Huron / Blue Water Bridge | downbound |
| 8 Oct 2025 | 06:44 EDT | Straits of Mackinac | eastbound |
| 6 Oct 2025 | 03:06 EDT | Straits of Mackinac | westbound |
| 4 Oct 2025 | 15:15 EDT | Port Huron / Blue Water Bridge | upbound |
| 4 Oct 2025 | 09:42 EDT | Detroit River / Ambassador Bridge | upbound |
| 2 Oct 2025 | 10:30 EDT | Detroit River / Ambassador Bridge | downbound |
September 2025 23 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 26 Sep 2025 | 02:34 EDT | Soo Locks (St. Marys River) | downbound |
| 24 Sep 2025 | 20:37 EDT | Soo Locks (St. Marys River) | upbound |
| 22 Sep 2025 | 05:12 EDT | Straits of Mackinac | eastbound |
| 20 Sep 2025 | 07:29 EDT | Straits of Mackinac | westbound |
| 18 Sep 2025 | 17:11 EDT | Detroit River / Ambassador Bridge | upbound |
| 18 Sep 2025 | 00:44 EDT | Detroit River / Ambassador Bridge | downbound |
| 17 Sep 2025 | 19:49 EDT | Detroit River / Ambassador Bridge | upbound |
| 17 Sep 2025 | 13:43 EDT | Port Huron / Blue Water Bridge | downbound |
| 15 Sep 2025 | 07:06 EDT | Detroit River / Ambassador Bridge | upbound |
| 13 Sep 2025 | 16:57 EDT | Detroit River / Ambassador Bridge | downbound |
| 13 Sep 2025 | 05:13 EDT | Port Huron / Blue Water Bridge | downbound |
| 11 Sep 2025 | 06:22 EDT | Port Huron / Blue Water Bridge | upbound |
| 10 Sep 2025 | 08:25 EDT | Port Huron / Blue Water Bridge | downbound |
| 8 Sep 2025 | 09:13 EDT | Port Huron / Blue Water Bridge | upbound |
| 8 Sep 2025 | 03:10 EDT | Detroit River / Ambassador Bridge | upbound |
| 7 Sep 2025 | 17:26 EDT | Detroit River / Ambassador Bridge | upbound |
| 7 Sep 2025 | 12:00 EDT | Port Huron / Blue Water Bridge | downbound |
| 5 Sep 2025 | 17:32 EDT | Port Huron / Blue Water Bridge | upbound |
| 5 Sep 2025 | 03:23 EDT | Detroit River / Ambassador Bridge | upbound |
| 3 Sep 2025 | 08:15 EDT | Detroit River / Ambassador Bridge | downbound |
| 2 Sep 2025 | 12:13 EDT | Port Huron / Blue Water Bridge | downbound |
| 2 Sep 2025 | 03:05 EDT | Port Huron / Blue Water Bridge | upbound |
| 1 Sep 2025 | 14:03 EDT | Port Huron / Blue Water Bridge | downbound |
August 2025 13 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 29 Aug 2025 | 19:32 EDT | Soo Locks (St. Marys River) | downbound |
| 27 Aug 2025 | 09:00 EDT | Soo Locks (St. Marys River) | upbound |
| 26 Aug 2025 | 09:49 EDT | Port Huron / Blue Water Bridge | upbound |
| 26 Aug 2025 | 03:55 EDT | Detroit River / Ambassador Bridge | upbound |
| 20 Aug 2025 | 13:28 EDT | Detroit River / Ambassador Bridge | downbound |
| 17 Aug 2025 | 13:00 EDT | Soo Locks (St. Marys River) | downbound |
| 16 Aug 2025 | 09:19 EDT | Soo Locks (St. Marys River) | upbound |
| 13 Aug 2025 | 03:43 EDT | Detroit River / Ambassador Bridge | upbound |
| 9 Aug 2025 | 20:17 EDT | Welland Canal (Thorold) | upbound |
| 6 Aug 2025 | 21:16 EDT | Detroit River / Ambassador Bridge | downbound |
| 6 Aug 2025 | 12:46 EDT | Port Huron / Blue Water Bridge | downbound |
| 2 Aug 2025 | 13:08 EDT | Soo Locks (St. Marys River) | downbound |
| 1 Aug 2025 | 11:14 EDT | Soo Locks (St. Marys River) | upbound |
July 2025 22 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 31 Jul 2025 | 14:18 EDT | Port Huron / Blue Water Bridge | upbound |
| 31 Jul 2025 | 07:59 EDT | Detroit River / Ambassador Bridge | upbound |
| 29 Jul 2025 | 11:05 EDT | Detroit River / Ambassador Bridge | downbound |
| 29 Jul 2025 | 05:29 EDT | Port Huron / Blue Water Bridge | downbound |
| 26 Jul 2025 | 16:25 EDT | Soo Locks (St. Marys River) | downbound |
| 25 Jul 2025 | 01:30 EDT | Soo Locks (St. Marys River) | upbound |
| 24 Jul 2025 | 04:06 EDT | Port Huron / Blue Water Bridge | upbound |
| 23 Jul 2025 | 22:19 EDT | Detroit River / Ambassador Bridge | upbound |
| 22 Jul 2025 | 20:40 EDT | Detroit River / Ambassador Bridge | downbound |
| 22 Jul 2025 | 11:46 EDT | Detroit River / Ambassador Bridge | upbound |
| 19 Jul 2025 | 01:47 EDT | Detroit River / Ambassador Bridge | upbound |
| 18 Jul 2025 | 20:08 EDT | Port Huron / Blue Water Bridge | downbound |
| 10 Jul 2025 | 23:33 EDT | Straits of Mackinac | westbound |
| 9 Jul 2025 | 11:18 EDT | Port Huron / Blue Water Bridge | upbound |
| 8 Jul 2025 | 23:08 EDT | Detroit River / Ambassador Bridge | upbound |
| 8 Jul 2025 | 16:10 EDT | Detroit River / Ambassador Bridge | upbound |
| 8 Jul 2025 | 09:01 EDT | Port Huron / Blue Water Bridge | downbound |
| 7 Jul 2025 | 14:29 EDT | Straits of Mackinac | eastbound |
| 4 Jul 2025 | 06:52 EDT | Straits of Mackinac | westbound |
| 2 Jul 2025 | 23:21 EDT | Port Huron / Blue Water Bridge | upbound |
| 2 Jul 2025 | 08:02 EDT | Port Huron / Blue Water Bridge | downbound |
| 30 Jun 2025 | 20:07 EDT | Straits of Mackinac | eastbound |
June 2025 23 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 29 Jun 2025 | 01:45 EDT | Straits of Mackinac | westbound |
| 27 Jun 2025 | 08:56 EDT | Soo Locks (St. Marys River) | downbound |
| 25 Jun 2025 | 17:26 EDT | Soo Locks (St. Marys River) | upbound |
| 24 Jun 2025 | 19:28 EDT | Port Huron / Blue Water Bridge | upbound |
| 24 Jun 2025 | 13:43 EDT | Detroit River / Ambassador Bridge | upbound |
| 23 Jun 2025 | 08:15 EDT | Detroit River / Ambassador Bridge | downbound |
| 22 Jun 2025 | 21:42 EDT | Detroit River / Ambassador Bridge | upbound |
| 22 Jun 2025 | 16:36 EDT | Detroit River / Ambassador Bridge | downbound |
| 22 Jun 2025 | 11:40 EDT | Port Huron / Blue Water Bridge | downbound |
| 18 Jun 2025 | 17:47 EDT | Straits of Mackinac | eastbound |
| 17 Jun 2025 | 00:53 EDT | Straits of Mackinac | westbound |
| 15 Jun 2025 | 18:05 EDT | Port Huron / Blue Water Bridge | upbound |
| 15 Jun 2025 | 12:40 EDT | Detroit River / Ambassador Bridge | upbound |
| 14 Jun 2025 | 11:11 EDT | Detroit River / Ambassador Bridge | downbound |
| 14 Jun 2025 | 05:55 EDT | Port Huron / Blue Water Bridge | downbound |
| 12 Jun 2025 | 20:31 EDT | Straits of Mackinac | eastbound |
| 11 Jun 2025 | 02:07 EDT | Straits of Mackinac | westbound |
| 8 Jun 2025 | 05:44 EDT | Straits of Mackinac | eastbound |
| 6 Jun 2025 | 09:12 EDT | Straits of Mackinac | westbound |
| 5 Jun 2025 | 03:17 EDT | Port Huron / Blue Water Bridge | upbound |
| 4 Jun 2025 | 13:55 EDT | Port Huron / Blue Water Bridge | downbound |
| 2 Jun 2025 | 13:59 EDT | Port Huron / Blue Water Bridge | upbound |
| 2 Jun 2025 | 08:36 EDT | Detroit River / Ambassador Bridge | upbound |
May 2025 27 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 30 May 2025 | 11:34 EDT | Detroit River / Ambassador Bridge | downbound |
| 30 May 2025 | 05:50 EDT | Port Huron / Blue Water Bridge | downbound |
| 28 May 2025 | 22:59 EDT | Straits of Mackinac | eastbound |
| 27 May 2025 | 03:42 EDT | Straits of Mackinac | westbound |
| 23 May 2025 | 04:19 EDT | Port Huron / Blue Water Bridge | upbound |
| 22 May 2025 | 11:36 EDT | Port Huron / Blue Water Bridge | downbound |
| 20 May 2025 | 15:00 EDT | Port Huron / Blue Water Bridge | upbound |
| 20 May 2025 | 07:49 EDT | Detroit River / Ambassador Bridge | upbound |
| 19 May 2025 | 19:34 EDT | Detroit River / Ambassador Bridge | upbound |
| 19 May 2025 | 14:01 EDT | Port Huron / Blue Water Bridge | downbound |
| 17 May 2025 | 11:54 EDT | Soo Locks (St. Marys River) | downbound |
| 16 May 2025 | 00:29 EDT | Soo Locks (St. Marys River) | upbound |
| 15 May 2025 | 03:33 EDT | Port Huron / Blue Water Bridge | upbound |
| 14 May 2025 | 21:34 EDT | Detroit River / Ambassador Bridge | upbound |
| 14 May 2025 | 04:36 EDT | Detroit River / Ambassador Bridge | downbound |
| 13 May 2025 | 12:23 EDT | Port Huron / Blue Water Bridge | downbound |
| 11 May 2025 | 20:54 EDT | Soo Locks (St. Marys River) | downbound |
| 10 May 2025 | 18:24 EDT | Soo Locks (St. Marys River) | upbound |
| 9 May 2025 | 21:45 EDT | Port Huron / Blue Water Bridge | upbound |
| 9 May 2025 | 16:08 EDT | Detroit River / Ambassador Bridge | upbound |
| 8 May 2025 | 09:57 EDT | Detroit River / Ambassador Bridge | downbound |
| 7 May 2025 | 13:23 EDT | Port Huron / Blue Water Bridge | downbound |
| 5 May 2025 | 18:09 EDT | Port Huron / Blue Water Bridge | upbound |
| 5 May 2025 | 02:41 EDT | Port Huron / Blue Water Bridge | downbound |
| 3 May 2025 | 01:47 EDT | Port Huron / Blue Water Bridge | upbound |
| 2 May 2025 | 12:16 EDT | Detroit River / Ambassador Bridge | upbound |
| 2 May 2025 | 08:10 EDT | Detroit River / Ambassador Bridge | upbound |
April 2025 13 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 28 Apr 2025 | 18:19 EDT | Detroit River / Ambassador Bridge | downbound |
| 28 Apr 2025 | 12:55 EDT | Port Huron / Blue Water Bridge | downbound |
| 25 Apr 2025 | 19:18 EDT | Soo Locks (St. Marys River) | downbound |
| 24 Apr 2025 | 03:34 EDT | Soo Locks (St. Marys River) | upbound |
| 23 Apr 2025 | 07:25 EDT | Port Huron / Blue Water Bridge | upbound |
| 23 Apr 2025 | 01:49 EDT | Detroit River / Ambassador Bridge | upbound |
| 20 Apr 2025 | 05:35 EDT | Detroit River / Ambassador Bridge | downbound |
| 18 Apr 2025 | 19:10 EDT | Port Huron / Blue Water Bridge | downbound |
| 16 Apr 2025 | 08:59 EDT | Port Huron / Blue Water Bridge | upbound |
| 15 Apr 2025 | 20:38 EDT | Port Huron / Blue Water Bridge | downbound |
| 12 Apr 2025 | 14:21 EDT | Soo Locks (St. Marys River) | downbound |
| 10 Apr 2025 | 15:39 EDT | Soo Locks (St. Marys River) | upbound |
| 9 Apr 2025 | 08:47 EDT | Port Huron / Blue Water Bridge | upbound |
January 2025 8 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 15 Jan 2025 | 08:43 EST | Port Huron / Blue Water Bridge | downbound |
| 13 Jan 2025 | 22:33 EST | Soo Locks (St. Marys River) | downbound |
| 7 Jan 2025 | 23:27 EST | Soo Locks (St. Marys River) | upbound |
| 6 Jan 2025 | 23:50 EST | Port Huron / Blue Water Bridge | upbound |
| 6 Jan 2025 | 18:37 EST | Detroit River / Ambassador Bridge | upbound |
| 3 Jan 2025 | 22:51 EST | Detroit River / Ambassador Bridge | upbound |
| 2 Jan 2025 | 14:03 EST | Port Huron / Blue Water Bridge | downbound |
| 1 Jan 2025 | 18:26 EST | Soo Locks (St. Marys River) | downbound |
2024 season
December 2024 12 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 27 Dec 2024 | 11:57 CST | Duluth Ship Canal | outbound |
| 20 Dec 2024 | 17:11 EST | Soo Locks (St. Marys River) | upbound |
| 20 Dec 2024 | 08:24 EST | Straits of Mackinac | eastbound |
| 18 Dec 2024 | 13:10 EST | Straits of Mackinac | westbound |
| 17 Dec 2024 | 14:04 EST | Soo Locks (St. Marys River) | downbound |
| 9 Dec 2024 | 16:26 EST | Soo Locks (St. Marys River) | upbound |
| 8 Dec 2024 | 17:38 EST | Port Huron / Blue Water Bridge | upbound |
| 8 Dec 2024 | 12:04 EST | Detroit River / Ambassador Bridge | upbound |
| 6 Dec 2024 | 10:43 EST | Port Huron / Blue Water Bridge | downbound |
| 4 Dec 2024 | 15:40 EST | Soo Locks (St. Marys River) | downbound |
| 4 Dec 2024 | 04:37 EST | Soo Locks (St. Marys River) | upbound |
| 2 Dec 2024 | 10:05 EST | Detroit River / Ambassador Bridge | upbound |
November 2024 17 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 30 Nov 2024 | 13:32 EST | Detroit River / Ambassador Bridge | downbound |
| 25 Nov 2024 | 13:40 EST | Soo Locks (St. Marys River) | downbound |
| 22 Nov 2024 | 15:07 CST | Superior Entry | outbound |
| 22 Nov 2024 | 03:22 CST | Superior Entry | inbound |
| 20 Nov 2024 | 10:24 EST | Soo Locks (St. Marys River) | upbound |
| 19 Nov 2024 | 03:51 EST | Port Huron / Blue Water Bridge | upbound |
| 18 Nov 2024 | 22:01 EST | Detroit River / Ambassador Bridge | upbound |
| 16 Nov 2024 | 07:54 EST | Welland Canal (Thorold) | upbound |
| 15 Nov 2024 | 05:41 EST | Welland Canal (Thorold) | downbound |
| 13 Nov 2024 | 02:14 EST | Detroit River / Ambassador Bridge | upbound |
| 12 Nov 2024 | 20:29 EST | Port Huron / Blue Water Bridge | downbound |
| 10 Nov 2024 | 21:07 EST | Port Huron / Blue Water Bridge | upbound |
| 10 Nov 2024 | 08:35 EST | Port Huron / Blue Water Bridge | downbound |
| 9 Nov 2024 | 02:10 EST | Soo Locks (St. Marys River) | downbound |
| 8 Nov 2024 | 15:54 EST | Soo Locks (St. Marys River) | upbound |
| 7 Nov 2024 | 18:00 EST | Soo Locks (St. Marys River) | downbound |
| 6 Nov 2024 | 02:39 CST | Duluth Ship Canal | outbound |
October 2024 10 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 22 Oct 2024 | 02:54 CDT | Superior Entry | inbound |
| 11 Oct 2024 | 11:01 CDT | Duluth Ship Canal | inbound |
| 9 Oct 2024 | 15:21 EDT | Soo Locks (St. Marys River) | upbound |
| 8 Oct 2024 | 17:42 EDT | Port Huron / Blue Water Bridge | upbound |
| 8 Oct 2024 | 12:30 EDT | Detroit River / Ambassador Bridge | upbound |
| 6 Oct 2024 | 13:36 EDT | Detroit River / Ambassador Bridge | downbound |
| 6 Oct 2024 | 08:07 EDT | Port Huron / Blue Water Bridge | downbound |
| 4 Oct 2024 | 19:43 EDT | Soo Locks (St. Marys River) | downbound |
| 3 Oct 2024 | 07:26 CDT | Duluth Ship Canal | outbound |
| 2 Oct 2024 | 18:03 CDT | Duluth Ship Canal | inbound |
September 2024 19 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 25 Sep 2024 | 10:57 EDT | Soo Locks (St. Marys River) | upbound |
| 24 Sep 2024 | 14:55 EDT | Soo Locks (St. Marys River) | downbound |
| 24 Sep 2024 | 06:04 EDT | Soo Locks (St. Marys River) | upbound |
| 21 Sep 2024 | 11:41 EDT | Soo Locks (St. Marys River) | downbound |
| 19 Sep 2024 | 00:49 CDT | Superior Entry | outbound |
| 18 Sep 2024 | 20:04 CDT | Superior Entry | inbound |
| 16 Sep 2024 | 12:06 EDT | Soo Locks (St. Marys River) | upbound |
| 15 Sep 2024 | 14:39 EDT | Port Huron / Blue Water Bridge | upbound |
| 15 Sep 2024 | 09:23 EDT | Detroit River / Ambassador Bridge | upbound |
| 14 Sep 2024 | 23:00 EDT | Detroit River / Ambassador Bridge | upbound |
| 14 Sep 2024 | 17:15 EDT | Port Huron / Blue Water Bridge | downbound |
| 12 Sep 2024 | 14:17 EDT | Port Huron / Blue Water Bridge | upbound |
| 11 Sep 2024 | 17:21 EDT | Port Huron / Blue Water Bridge | downbound |
| 8 Sep 2024 | 14:07 EDT | Soo Locks (St. Marys River) | downbound |
| 4 Sep 2024 | 17:30 EDT | Soo Locks (St. Marys River) | upbound |
| 3 Sep 2024 | 08:57 EDT | Port Huron / Blue Water Bridge | upbound |
| 2 Sep 2024 | 22:44 EDT | Detroit River / Ambassador Bridge | upbound |
| 2 Sep 2024 | 15:49 EDT | Detroit River / Ambassador Bridge | upbound |
| 2 Sep 2024 | 10:27 EDT | Port Huron / Blue Water Bridge | downbound |
August 2024 18 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 29 Aug 2024 | 18:25 EDT | Soo Locks (St. Marys River) | downbound |
| 23 Aug 2024 | 08:37 EDT | Soo Locks (St. Marys River) | upbound |
| 22 Aug 2024 | 02:52 EDT | Port Huron / Blue Water Bridge | upbound |
| 19 Aug 2024 | 07:39 EDT | Detroit River / Ambassador Bridge | upbound |
| 19 Aug 2024 | 02:22 EDT | Port Huron / Blue Water Bridge | downbound |
| 17 Aug 2024 | 17:19 EDT | Soo Locks (St. Marys River) | downbound |
| 16 Aug 2024 | 03:25 CDT | Duluth Ship Canal | outbound |
| 15 Aug 2024 | 19:01 CDT | Duluth Ship Canal | inbound |
| 13 Aug 2024 | 04:39 CDT | Duluth Ship Canal | outbound |
| 12 Aug 2024 | 17:05 CDT | Duluth Ship Canal | inbound |
| 9 Aug 2024 | 22:06 EDT | Soo Locks (St. Marys River) | upbound |
| 8 Aug 2024 | 23:54 EDT | Port Huron / Blue Water Bridge | upbound |
| 8 Aug 2024 | 18:12 EDT | Detroit River / Ambassador Bridge | upbound |
| 6 Aug 2024 | 05:47 EDT | Detroit River / Ambassador Bridge | downbound |
| 4 Aug 2024 | 23:18 EDT | Port Huron / Blue Water Bridge | downbound |
| 4 Aug 2024 | 14:20 EDT | Port Huron / Blue Water Bridge | upbound |
| 3 Aug 2024 | 21:22 EDT | Port Huron / Blue Water Bridge | downbound |
| 2 Aug 2024 | 10:22 EDT | Straits of Mackinac | eastbound |
July 2024 20 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 31 Jul 2024 | 13:59 EDT | Straits of Mackinac | westbound |
| 30 Jul 2024 | 07:30 EDT | Port Huron / Blue Water Bridge | upbound |
| 30 Jul 2024 | 01:56 EDT | Detroit River / Ambassador Bridge | upbound |
| 27 Jul 2024 | 15:44 EDT | Welland Canal (Thorold) | upbound |
| 26 Jul 2024 | 09:46 EDT | Welland Canal (Thorold) | downbound |
| 24 Jul 2024 | 02:56 EDT | Detroit River / Ambassador Bridge | downbound |
| 23 Jul 2024 | 21:33 EDT | Port Huron / Blue Water Bridge | downbound |
| 22 Jul 2024 | 10:10 EDT | Straits of Mackinac | eastbound |
| 20 Jul 2024 | 16:33 EDT | Straits of Mackinac | westbound |
| 17 Jul 2024 | 23:24 EDT | Straits of Mackinac | westbound |
| 17 Jul 2024 | 02:27 EDT | Soo Locks (St. Marys River) | downbound |
| 16 Jul 2024 | 17:28 EDT | Soo Locks (St. Marys River) | upbound |
| 15 Jul 2024 | 20:16 EDT | Port Huron / Blue Water Bridge | upbound |
| 15 Jul 2024 | 13:13 EDT | Detroit River / Ambassador Bridge | upbound |
| 14 Jul 2024 | 09:23 EDT | Detroit River / Ambassador Bridge | downbound |
| 13 Jul 2024 | 18:56 EDT | Port Huron / Blue Water Bridge | downbound |
| 10 Jul 2024 | 15:38 EDT | Soo Locks (St. Marys River) | downbound |
| 8 Jul 2024 | 03:48 CDT | Duluth Ship Canal | outbound |
| 7 Jul 2024 | 11:22 CDT | Duluth Ship Canal | inbound |
| 1 Jul 2024 | 09:47 EDT | Soo Locks (St. Marys River) | upbound |
June 2024 27 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 30 Jun 2024 | 12:10 EDT | Port Huron / Blue Water Bridge | upbound |
| 30 Jun 2024 | 04:56 EDT | Detroit River / Ambassador Bridge | upbound |
| 28 Jun 2024 | 14:01 EDT | Detroit River / Ambassador Bridge | upbound |
| 28 Jun 2024 | 10:51 EDT | Detroit River / Ambassador Bridge | upbound |
| 28 Jun 2024 | 00:39 EDT | Port Huron / Blue Water Bridge | downbound |
| 26 Jun 2024 | 03:16 EDT | Port Huron / Blue Water Bridge | upbound |
| 25 Jun 2024 | 21:54 EDT | Detroit River / Ambassador Bridge | upbound |
| 25 Jun 2024 | 11:23 EDT | Detroit River / Ambassador Bridge | upbound |
| 25 Jun 2024 | 05:48 EDT | Port Huron / Blue Water Bridge | downbound |
| 24 Jun 2024 | 11:23 EDT | Straits of Mackinac | eastbound |
| 21 Jun 2024 | 16:45 EDT | Straits of Mackinac | westbound |
| 20 Jun 2024 | 09:18 EDT | Port Huron / Blue Water Bridge | upbound |
| 20 Jun 2024 | 03:44 EDT | Detroit River / Ambassador Bridge | upbound |
| 18 Jun 2024 | 20:12 EDT | Detroit River / Ambassador Bridge | downbound |
| 18 Jun 2024 | 14:52 EDT | Port Huron / Blue Water Bridge | downbound |
| 16 Jun 2024 | 13:36 EDT | Port Huron / Blue Water Bridge | upbound |
| 15 Jun 2024 | 23:38 EDT | Port Huron / Blue Water Bridge | downbound |
| 13 Jun 2024 | 20:38 EDT | Port Huron / Blue Water Bridge | upbound |
| 13 Jun 2024 | 15:14 EDT | Detroit River / Ambassador Bridge | upbound |
| 12 Jun 2024 | 11:24 EDT | Port Huron / Blue Water Bridge | downbound |
| 10 Jun 2024 | 06:26 EDT | Port Huron / Blue Water Bridge | upbound |
| 9 Jun 2024 | 17:46 EDT | Detroit River / Ambassador Bridge | upbound |
| 9 Jun 2024 | 12:02 EDT | Port Huron / Blue Water Bridge | downbound |
| 4 Jun 2024 | 00:59 EDT | Soo Locks (St. Marys River) | downbound |
| 3 Jun 2024 | 16:21 EDT | Soo Locks (St. Marys River) | upbound |
| 2 Jun 2024 | 18:26 EDT | Port Huron / Blue Water Bridge | upbound |
| 2 Jun 2024 | 12:51 EDT | Detroit River / Ambassador Bridge | upbound |
May 2024 33 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 30 May 2024 | 19:12 EDT | Detroit River / Ambassador Bridge | downbound |
| 30 May 2024 | 15:51 EDT | Detroit River / Ambassador Bridge | upbound |
| 30 May 2024 | 05:18 EDT | Port Huron / Blue Water Bridge | downbound |
| 28 May 2024 | 03:00 EDT | Port Huron / Blue Water Bridge | upbound |
| 27 May 2024 | 21:32 EDT | Detroit River / Ambassador Bridge | upbound |
| 27 May 2024 | 12:57 EDT | Detroit River / Ambassador Bridge | downbound |
| 27 May 2024 | 07:38 EDT | Port Huron / Blue Water Bridge | downbound |
| 26 May 2024 | 13:12 EDT | Straits of Mackinac | eastbound |
| 23 May 2024 | 14:25 EDT | Straits of Mackinac | westbound |
| 22 May 2024 | 06:59 EDT | Port Huron / Blue Water Bridge | upbound |
| 21 May 2024 | 21:10 EDT | Detroit River / Ambassador Bridge | upbound |
| 21 May 2024 | 13:54 EDT | Detroit River / Ambassador Bridge | downbound |
| 21 May 2024 | 08:43 EDT | Port Huron / Blue Water Bridge | downbound |
| 19 May 2024 | 15:18 EDT | Port Huron / Blue Water Bridge | upbound |
| 19 May 2024 | 09:50 EDT | Detroit River / Ambassador Bridge | upbound |
| 18 May 2024 | 11:08 EDT | Detroit River / Ambassador Bridge | downbound |
| 18 May 2024 | 05:40 EDT | Port Huron / Blue Water Bridge | downbound |
| 16 May 2024 | 13:23 EDT | Port Huron / Blue Water Bridge | upbound |
| 16 May 2024 | 07:58 EDT | Detroit River / Ambassador Bridge | upbound |
| 15 May 2024 | 20:41 EDT | Detroit River / Ambassador Bridge | upbound |
| 15 May 2024 | 15:12 EDT | Port Huron / Blue Water Bridge | downbound |
| 11 May 2024 | 17:49 EDT | Port Huron / Blue Water Bridge | upbound |
| 11 May 2024 | 11:56 EDT | Detroit River / Ambassador Bridge | upbound |
| 11 May 2024 | 01:24 EDT | Detroit River / Ambassador Bridge | upbound |
| 10 May 2024 | 19:54 EDT | Port Huron / Blue Water Bridge | downbound |
| 7 May 2024 | 18:44 EDT | Soo Locks (St. Marys River) | downbound |
| 6 May 2024 | 13:10 EDT | Soo Locks (St. Marys River) | upbound |
| 5 May 2024 | 16:34 EDT | Port Huron / Blue Water Bridge | upbound |
| 5 May 2024 | 10:52 EDT | Detroit River / Ambassador Bridge | upbound |
| 5 May 2024 | 03:27 EDT | Detroit River / Ambassador Bridge | upbound |
| 4 May 2024 | 22:12 EDT | Port Huron / Blue Water Bridge | downbound |
| 3 May 2024 | 08:15 EDT | Port Huron / Blue Water Bridge | upbound |
| 3 May 2024 | 00:14 EDT | Port Huron / Blue Water Bridge | downbound |
April 2024 30 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 28 Apr 2024 | 18:37 EDT | Port Huron / Blue Water Bridge | upbound |
| 28 Apr 2024 | 06:28 EDT | Port Huron / Blue Water Bridge | downbound |
| 26 Apr 2024 | 08:51 EDT | Port Huron / Blue Water Bridge | upbound |
| 25 Apr 2024 | 23:37 EDT | Detroit River / Ambassador Bridge | upbound |
| 25 Apr 2024 | 13:35 EDT | Detroit River / Ambassador Bridge | upbound |
| 25 Apr 2024 | 08:17 EDT | Port Huron / Blue Water Bridge | downbound |
| 23 Apr 2024 | 10:39 EDT | Port Huron / Blue Water Bridge | upbound |
| 23 Apr 2024 | 05:15 EDT | Detroit River / Ambassador Bridge | upbound |
| 22 Apr 2024 | 22:43 EDT | Detroit River / Ambassador Bridge | upbound |
| 22 Apr 2024 | 13:47 EDT | Port Huron / Blue Water Bridge | downbound |
| 18 Apr 2024 | 06:22 EDT | Port Huron / Blue Water Bridge | upbound |
| 18 Apr 2024 | 00:58 EDT | Detroit River / Ambassador Bridge | upbound |
| 17 Apr 2024 | 15:33 EDT | Detroit River / Ambassador Bridge | downbound |
| 17 Apr 2024 | 10:19 EDT | Port Huron / Blue Water Bridge | downbound |
| 15 Apr 2024 | 09:41 EDT | Port Huron / Blue Water Bridge | upbound |
| 15 Apr 2024 | 02:23 EDT | Port Huron / Blue Water Bridge | downbound |
| 12 Apr 2024 | 21:01 EDT | Port Huron / Blue Water Bridge | upbound |
| 12 Apr 2024 | 15:18 EDT | Detroit River / Ambassador Bridge | upbound |
| 12 Apr 2024 | 04:12 EDT | Detroit River / Ambassador Bridge | upbound |
| 11 Apr 2024 | 22:47 EDT | Port Huron / Blue Water Bridge | downbound |
| 10 Apr 2024 | 05:11 EDT | Port Huron / Blue Water Bridge | upbound |
| 9 Apr 2024 | 20:52 EDT | Detroit River / Ambassador Bridge | upbound |
| 9 Apr 2024 | 00:34 EDT | Welland Canal (Thorold) | upbound |
| 7 Apr 2024 | 17:11 EDT | Welland Canal (Thorold) | downbound |
| 6 Apr 2024 | 06:32 EDT | Detroit River / Ambassador Bridge | downbound |
| 5 Apr 2024 | 15:36 EDT | Port Huron / Blue Water Bridge | downbound |
| 2 Apr 2024 | 19:22 EDT | Port Huron / Blue Water Bridge | upbound |
| 2 Apr 2024 | 13:39 EDT | Detroit River / Ambassador Bridge | upbound |
| 2 Apr 2024 | 02:21 EDT | Detroit River / Ambassador Bridge | upbound |
| 1 Apr 2024 | 20:48 EDT | Port Huron / Blue Water Bridge | downbound |
March 2024 4 passages
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 31 Mar 2024 | 00:58 EDT | Port Huron / Blue Water Bridge | upbound |
| 30 Mar 2024 | 19:14 EDT | Detroit River / Ambassador Bridge | upbound |
| 29 Mar 2024 | 00:05 EDT | Detroit River / Ambassador Bridge | downbound |
| 27 Mar 2024 | 07:41 EDT | Detroit River / Ambassador Bridge | upbound |
January 2024 1 passage
| Date | Local time | Chokepoint | Direction |
|---|---|---|---|
| 5 Jan 2024 | 23:10 EST | Welland Canal (Thorold) | upbound |