AIS Archive Updated (January 2024 – December 2025)
28,207 Recorded Passages Across Great Lakes Chokepoints
FL
FreighterLog
Great Lakes Passage Record & Vessel Directory

Observed lakes vessel

Heemskerkgracht

No fleet affiliation on record · Cargo · 138 m. Range: Lakes and Seaway. 20 recorded passages across 5 chokepoints.

Last recorded passage

downbound at Welland Canal (Thorold)

21 Dec 2025, 11:58 EST — ±15 min · see the December 2025 log

Archive Record Scope: Transits shown are compiled from verified AIS records covering January 2024 through December 2025. For real-time satellite AIS tracking, check BoatNerd or VesselFinder links below.

FreighterLog is the record, not the map. For where Heemskerkgracht 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 Heemskerkgracht 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. Heemskerkgracht feed · all chokepoints

Specification

Dimensions and identifiers as broadcast over AIS; AIS-reported figures are self-declared by the vessel and are not a registry of record.
Name (AIS) HEEMSKERKGRACHT
MMSI 244010871
IMO IMO9443669
Call sign PBOQ
Length overall 138 m (453 ft)
Beam 21 m (69 ft)
AIS vessel type Cargo
Hull type —
Operator No fleet match (salty, unaffiliated hull, or an AIS spelling this roster has not yet folded in)
Flag —

Passage record

  • 20 Passages January 2024 – December 2025
  • 5 Chokepoints of 7 monitored
  • 7 Aug 2024 First in archive UTC date
  • 21 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 8 passages
Date Local time Chokepoint Direction
21 Dec 2025 11:58 EST Welland Canal (Thorold) downbound
20 Dec 2025 13:35 EST Detroit River / Ambassador Bridge downbound
20 Dec 2025 05:01 EST Port Huron / Blue Water Bridge downbound
19 Dec 2025 05:48 EST Soo Locks (St. Marys River) downbound
3 Dec 2025 17:05 EST Soo Locks (St. Marys River) upbound
2 Dec 2025 17:39 EST Port Huron / Blue Water Bridge upbound
2 Dec 2025 11:37 EST Detroit River / Ambassador Bridge upbound
1 Dec 2025 14:37 EST Welland Canal (Thorold) upbound
July 2025 2 passages
Date Local time Chokepoint Direction
26 Jul 2025 10:43 EDT Welland Canal (Thorold) downbound
22 Jul 2025 05:38 EDT Welland Canal (Thorold) upbound

2024 season

August 2024 10 passages
Date Local time Chokepoint Direction
15 Aug 2024 20:59 EDT Welland Canal (Thorold) downbound
14 Aug 2024 22:37 EDT Detroit River / Ambassador Bridge downbound
14 Aug 2024 15:06 EDT Port Huron / Blue Water Bridge downbound
13 Aug 2024 19:08 EDT Soo Locks (St. Marys River) downbound
12 Aug 2024 07:31 CDT Duluth Ship Canal outbound
10 Aug 2024 11:16 CDT Duluth Ship Canal inbound
9 Aug 2024 01:42 EDT Soo Locks (St. Marys River) upbound
8 Aug 2024 06:19 EDT Port Huron / Blue Water Bridge upbound
8 Aug 2024 01:03 EDT Detroit River / Ambassador Bridge upbound
7 Aug 2024 05:04 EDT Welland Canal (Thorold) upbound