Synchronizing…
A public reference property of Baalvion
Open data · every figure carries its source

Largest in this registry
#56,376
of 84,014 with a recorded tonnage
Largest tug
#90
of 1,263 of this type with a recorded tonnage
Largest in its fleet
#4
of 5 in this fleet with a recorded tonnage
In brief
The Sovereign is a large sea-going tugboat owned and operated by Royal Boskalis Westminster N.V.
The vessel is powered by conventional propulsion and was built as a multi-purpose anchor handling tug supply vessel. It was christened on 27 August 2003 as Anglian Sovereign. The vessel was part of the fleet of Emergency Towing Vessels that operated on behalf of the UK's Maritime and Coastguard Agency.
On 3 September 2005, Union Sovereign ran aground off Oxna island in the Scalloway Islands while conducting hydrographic surveys. No injuries occurred but the vessel lost approximately 84 tonnes of gas oil and was severely damaged. A 2006 official report found that the shipmaster's consumption of alcohol and several other negligences on board had been the cause of the incident.
In 2007, ownership transferred to JP Knight, which purchased the initial owner, Klyne Tugs of Lowestoft.
Vessel particulars
Every value is as recorded in the source. Blanks are values the source does not hold — none is estimated from a sister ship or a class average.
Identification
Construction
Measurements
In context
Every figure in this section is a count, a rank or a percentile over vessels actually held in this registry — not over the world fleet, which is larger. Nothing here is estimated.
At 2,258 gross tons, Union Sovereign is the 56,376th largest of the 84,014 vessels in this registry that report a tonnage. The median across that set is 5,994 GT, so this hull is about 2.7 times smaller than the typical vessel on record here. The largest measures 499,167 GT.
Among the 1,471 tugs held here, it ranks 90th by tonnage — larger than 93% of that group. Their median tonnage is 393 GT, and the largest tenth begin at 1,733 GT. The flag most often flown by this group is United States (239 ships). The yard that appears most often against it is Damen Shipyards Gorinchem, with 62 hulls on record.
Belgium is the country of registry for 258 vessels in this directory, of which Union Sovereign is the 115th largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (191 ships), and the median vessel measures 2,462 GT. Browse every ship flagged Belgium.
Narrowing to both dimensions at once, this registry holds 12 tugs flying the Belgium flag, of which 1 is larger by tonnage.
Union Sovereign was built in 2003, making it 23 years old. It is one of 1,383 hulls in this registry delivered that year, a cohort whose median tonnage is 11,954 GT; within it this ship is the 989th largest. Across the whole of the 2000s the registry holds 18,605 vessels, median 9,957 GT. The median build year across the entire registry is 1995.
The registry attributes 13 vessels to Yantai Raffles Shipyard, with a median tonnage of 26,951 GT, delivered between 2002 and 2026. See the rest of that yard’s output.
At 67.4 m overall, Union Sovereign is 35.1 m longer than the 32.3 m median for tugs on record, with a beam of 15.5 m and a draft of 6.2 m.
IMO numbers are issued in broadly chronological blocks. Within 500 either side of 9262742 this registry holds 66 other vessels, whose median build year is 2003 and which range from 2001 to 2009. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 2003.
Its IMO number, 9262742, carries its own check digit. The first six digits are weighted seven down to two and summed — 9×7 + 2×6 + 6×5 + 2×4 + 7×3 + 4×2 = 142 — and the last digit of that total, 2, must equal the seventh digit, 2. It does, so this number is well formed.
Nearest by tonnage among tugs
| Ship | Built | Gross tonnage |
|---|---|---|
| Oceanic | 1969 | 2,294 |
| Smit Rotterdam | 1975 | 2,273 |
| Titan | 1983 | 2,267 |
| Union Sovereign (this ship) | 2003 | 2,258 |
| Jarvis | 1998 | 2,235 |
| Ocean Morganite | 2013 | 2,207 |
| Ocean Coral |
Same yard, same years
No ship class is recorded for this vessel, so these are not asserted to be sister ships — they are contemporaries from the same builder, shown because that is what the data supports.
Same fleet
Provenance
Vessel recordWikidata, released under CC0, keyed on this ship’s IMO number.
Written summaryQuoted from Anglian Sovereign on English Wikipedia, reused under CC BY-SA 4.0.
PhotographBy kees torn, reused under CC BY-SA 2.0.
| 2013 |
| 2,207 |