HMS Argyll

At 3,500 gross tons, HMS Argyll is the 49,807th 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 1.7 times smaller than the typical vessel on record here. The largest measures 499,167 GT.

Among the 611 naval / patrols held here, it ranks 80th by tonnage — larger than 70% 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.

HMS Argyll was built in 1991, making it 35 years old. It is one of 1,166 hulls in this registry delivered that year, a cohort whose median tonnage is 2,997 GT; within it this ship is the 525th largest. Across the whole of the 1990s the registry holds 12,006 vessels, median 4,956 GT. The median build year across the entire registry is 1995.

The registry attributes 24 vessels to Yarrow Shipbuilders Limited, with a median tonnage of 3,850 GT, delivered between 1923 and 2008. See the rest of that yard’s output.

At 132.9 m overall, HMS Argyll is 46.4 m longer than the 86.5 m median for naval / patrols on record, with a beam of 16.1 m and a draft of 7.3 m.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 8949599 this registry holds 34 other vessels, whose median build year is 1991 and which range from 1970 to 2002. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1991.

Its IMO number, 8949599, carries its own check digit. The first six digits are weighted seven down to two and summed — 8×7 + 9×6 + 4×5 + 9×4 + 5×3 + 9×2 = 199 — and the last digit of that total, 9, must equal the seventh digit, 9. It does, so this number is well formed.