At 23,294 gross tons, RFA Wave Ruler is the 24,313th 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 32nd by tonnage — larger than 88% 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 Wave Ruler is the 290th 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 7 are larger by tonnage.
RFA Wave Ruler 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 525th 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 Marine, with a median tonnage of 24,471 GT, delivered between 2003 and 2004. See the rest of that yard’s output.
At 196.3 m overall, RFA Wave Ruler is 109.8 m longer than the 86.5 m median for naval / patrols on record, with a beam of 28.3 m and a draft of 10.0 m.
IMO numbers are issued in broadly chronological blocks. Within 500 either side of 9168609 this registry holds 66 other vessels, whose median build year is 1998 and which range from 1997 to 2003. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 2003.
Its IMO number, 9168609, carries its own check digit. The first six digits are weighted seven down to two and summed — 9×7 + 1×6 + 6×5 + 8×4 + 6×3 + 0×2 = 149 — and the last digit of that total, 9, must equal the seventh digit, 9. It does, so this number is well formed.
