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Naval / patrol
Operated by His Majesty's Naval Service
Photo: Michael Q. Retana, U.S. Marine Corps · Public domain · file
Largest in this registry
#24,024
of 84,014 with a recorded tonnage
Largest naval / patrol
#28
of 268 of this type with a recorded tonnage
Largest in its fleet
#6
of 9 in this fleet with a recorded tonnage
In brief
RFA Mounts Bay is a Bay-class auxiliary landing ship dock (LSD(A)) of the Royal Fleet Auxiliary. She is named after Mount's Bay in Cornwall. As of 2024, Mounts Bay is the principal vessel assigned to the Royal Navy's Littoral Response Group (North).
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 23,569 gross tons, RFA Mounts Bay is the 24,024th 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 3.9 times the typical vessel on record here. The largest measures 499,167 GT.
Among the 611 naval / patrols held here, it ranks 28th by tonnage — larger than 89% of that group. Their median tonnage is 1,325 GT, and the largest tenth begin at 23,606 GT. The flag most often flown by this group is United States (136 ships). The yard that appears most often against it is Austal, with 33 hulls on record.
United Kingdom is the country of registry for 2,394 vessels in this directory, of which RFA Mounts Bay is the 286th largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (1,835 ships), and the median vessel measures 2,515 GT. Browse every ship flagged United Kingdom.
Narrowing to both dimensions at once, this registry holds 46 naval / patrols flying the United Kingdom flag, of which 4 are larger by tonnage.
RFA Mounts Bay was built in 2006, making it 20 years old. It is one of 2,118 hulls in this registry delivered that year, a cohort whose median tonnage is 8,539 GT; within it this ship is the 745th 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 3 vessels to BAE Systems, with a median tonnage of 23,569 GT, delivered between 2006 and 2007. See the rest of that yard’s output.
At 176.6 m overall, RFA Mounts Bay is 90.1 m longer than the 86.5 m median for naval / patrols on record, with a beam of 26.4 m and a draft of 5.8 m.
IMO numbers are issued in broadly chronological blocks. Within 500 either side of 9240770 this registry holds 68 other vessels, whose median build year is 2002 and which range from 1992 to 2009. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 2006.
Its IMO number, 9240770, carries its own check digit. The first six digits are weighted seven down to two and summed — 9×7 + 2×6 + 4×5 + 0×4 + 7×3 + 7×2 = 130 — and the last digit of that total, 0, must equal the seventh digit, 0. It does, so this number is well formed.
Nearest by tonnage among naval / patrols
| Ship | Built | Gross tonnage |
|---|---|---|
| USNS Kanawha | 1991 | 25,742 |
| USNS John Ericsson | 1991 | 25,742 |
| HNLMS Rotterdam | 1998 | 23,694 |
| RFA Mounts Bay (this ship) | 2006 | 23,569 |
| RFA Wave Ruler | 2003 | 23,294 |
| INS Jyoti | 1996 | 21,585 |
Record
Events recorded against this vessel in the source, with the dates the source gives. An event with no date is listed last rather than assigned one.
Class
| Ship | IMO | Flag | Built | Gross tonnage |
|---|---|---|---|---|
| HMAS Choules | 9240756 | Australia | 2006 | 23,569 |
| RFA Cardigan Bay | 9240782 | United Kingdom | 2006 | 23,569 |
| RFA Lyme Bay | 9240768 | United Kingdom | 2007 | 23,569 |
Same fleet
Provenance
Vessel recordWikidata, released under CC0, keyed on this ship’s IMO number.
Written summaryQuoted from RFA Mounts Bay on English Wikipedia, reused under CC BY-SA 4.0.
PhotographBy Michael Q. Retana, U.S. Marine Corps, reused under Public domain.
| 2010 |
| 21,187 |