What kind of ship is Castor?

Castor is a pleasure craft sailing under the flag of Netherlands, built in 1950 by Boele's Scheepswerven & Machinefabriek. The vessel is 46 m long with a beam of 8.4 m and has a gross tonnage of 439.

What sanctions and inspection records does Seadar hold for Castor?

Seadar has no matched sanctions record displayed for Castor from the OFAC SDN list, the UK Sanctions List, the Canadian autonomous sanctions list, the EU list of designated vessels and the New Zealand Russia Sanctions Register. Coverage may be incomplete; this is not sanctions clearance. No matched inspection records are displayed for Castor. Missing records do not establish whether the ship has been detained.

Castor

Pleasure craft · Netherlands · built 1950 · AIS Class A

IMO8633114MMSI244730396Call signPB9478Last AIS position Oct 1, 2026, 19:33 UTC

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In short

Castor (Pleasure craft, Netherlands flag) was last seen on AIS on Oct 1, 2026, 19:33 UTC, not moving, near Rotterdam (North Sea). Its reported AIS draught is 3.2 m (voyage report via AISstream.io global terrestrial AIS, received Oct 1, 2026, 18:53 UTC). Its last detected port call was at Rotterdam: arrived Sep 12, 2026, left Sep 19, 2026. Registered owner: Castor Charter B.V. (source: ILT — Nederlands vlagregister (Netherlands flag register data)).

Vessel type: Pleasure craft
Flag: Netherlands
Year built: 1950
Gross tonnage: 439
Size (length × beam): 46 m × 8 m
Registered owner: Castor Charter B.V.

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Last reported position

received Oct 1, 2026, 19:33 UTC

Position: 51.9039° N, 4.4859° E
Area: North Sea
StatusWhat do AIS statuses mean?: Under way using engine
Speed: 0 kn
Course: 169°
Heading: —

51.9039° N, 4.4859° E

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Last 30 days: 1 port call (Rotterdam).

Port calls are detected by Seadar from AIS (at least 30 minutes slow inside a harbour area); see Port calls below.

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Identity & particulars

Name: Castor
IMO numberWhat is an IMO number?: 8633114
MMSIWhat is an MMSI?: 244730396
Call signWhat is a call sign?: PB9478
Flag: Netherlands
Vessel type: Pleasure craft
Gross tonnageGross tonnage vs deadweight: 439
Net tonnage: Source: ILT — Nederlands vlagregister (Netherlands flag register data), record 826. Added to Seadar on September 28, 2026. Licence: CC0 1.0 (ilent.nl site-wide).114
Length overall: 46 m
Beam: 8.4 m
Year built: 1950

A tag next to a value names the register that supplied it (hover or tap it for the record and date). Values without a tag come from the ship's own AIS broadcasts or from Wikidata. Position and identity are derived live from AIS.

Ownership & management

Each line shows where the fact comes from. Links backed by an identifier point to the company page.

Registered owner: Castor Charter B.V.(not linked to a company record)
Source: ILT — Nederlands vlagregister (Netherlands flag register data) · reported · confidence 0.9 · retrieved Oct 1, 2026
Builder: Boele's Scheepswerven & Machinefabriek
Source: Wikidata · reported · confidence 0.8 · retrieved Sep 22, 2026
GEBR.POT(not linked to a company record)
Source: ILT — Nederlands vlagregister (Netherlands flag register data) · reported · confidence 0.9 · retrieved Oct 1, 2026

Timeline

Dated events for this ship from every source Seadar holds, newest first. Each line names its source; derived items say how they were derived.

Date	Event	Source
Sep 19, 2026, 17:51 UTC	Left RotterdamAIS-detected	Seadar port-call detector (AIS geofence)
Sep 12, 2026, 05:07 UTC	Arrived at RotterdamAIS-detected	Seadar port-call detector (AIS geofence)
Sep 12, 2026, 05:05 UTC	Left RotterdamAIS-detected	Seadar port-call detector (AIS geofence)
Jul 15, 2026, 21:25 UTC	Arrived at RotterdamAIS-detected	Seadar port-call detector (AIS geofence)
Jun 30, 2026, 11:15 UTC	Left RotterdamAIS-detected	Seadar port-call detector (AIS geofence)
Jun 21, 2026, 15:43 UTC	Arrived at RotterdamAIS-detected	Seadar port-call detector (AIS geofence)
Jan 1, 1988	Former name: Redeemer	Wikidata

Owner, operator and manager changes found by comparing yearly EU MRV reports are dated to the reporting year ("during 2025"), not to a day. Port calls here are the most recent only; the full lists are further down.

Former and other names

Names attested for this ship other than its current name.

Name	Evidence	Date	Source
Redeemer	Former name	Jan 1, 1988	Wikidata

A sanctions list's date is the earliest date the list shows the name, not when the ship took it. A name on a list is shown as a former name only where AIS shows the ship using another name after that date; otherwise it is listed as a name the list uses. AIS name changes are dated when Seadar saw them.

Source: Wikidata. Licence: CC0 1.0.

Port calls

Two kinds of evidence, kept apart: calls Seadar detected from the ship's AIS positions, and arrivals and departures published by port authorities and customs records.

Detected from AIS AIS-detected

Port	Arrived	Departed	Time in port
Rotterdam NLRTM	Sep 12, 2026, 05:07 UTC	Sep 19, 2026, 17:51 UTC	7 d 12 h
Rotterdam NLRTM	Jul 15, 2026, 21:25 UTC	Sep 12, 2026, 05:05 UTC	58 d 7 h
Rotterdam NLRTM	Jun 21, 2026, 15:43 UTC	Jun 30, 2026, 11:15 UTC	8 d 19 h
Rotterdam NLRTM	Jun 14, 2026, 14:58 UTC	Jun 21, 2026, 15:41 UTC	7 d 0 h
Rotterdam NLRTM	Jun 14, 2026, 11:09 UTC	Jun 14, 2026, 14:56 UTC	3 h 48 min
Rotterdam NLRTM	Jun 13, 2026, 03:50 UTC	Jun 14, 2026, 11:07 UTC	31 h 17 min
Rotterdam NLRTM	Jun 10, 2026, 16:15 UTC	Jun 13, 2026, 03:30 UTC	2 d 11 h

Detected by Seadar when the ship's AIS positions stayed slow inside a harbour area. Calls shorter than 30 minutes are not shown. Depends on AIS reception; detection started on June 8, 2026.

Frequently asked questions

Where is Castor now?: Castor (Pleasure craft, Netherlands flag) was last seen on AIS on Oct 1, 2026, 19:33 UTC, not moving, near Rotterdam (North Sea).
What kind of ship is Castor?: Castor is a pleasure craft sailing under the flag of Netherlands, built in 1950 by Boele's Scheepswerven & Machinefabriek. The vessel is 46 m long with a beam of 8.4 m and has a gross tonnage of 439.
Who is recorded as the owner or manager of Castor?: Castor Charter B.V. is recorded as Registered owner for Castor (source: ILT — Nederlands vlagregister (Netherlands flag register data)). This source record does not independently confirm today’s ownership or management.
What sanctions and inspection records does Seadar hold for Castor?: Seadar has no matched sanctions record displayed for Castor from the OFAC SDN list, the UK Sanctions List, the Canadian autonomous sanctions list, the EU list of designated vessels and the New Zealand Russia Sanctions Register. Coverage may be incomplete; this is not sanctions clearance. No matched inspection records are displayed for Castor. Missing records do not establish whether the ship has been detained.

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