Atreus

At 7,800 gross tons, Atreus is the 38,988th 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 1.3 times the typical vessel on record here. The largest measures 499,167 GT.

Among the 58,086 vessels this registry holds no type classification for held here, it ranks 22,297th by tonnage — larger than 55% of that group. Their median tonnage is 5,358 GT, and the largest tenth begin at 54,309 GT. The flag most often flown by this group is Panama (5,698 ships). The yard that appears most often against it is HD Hyundai Mipo, with 615 hulls on record.

Atreus was built in 1951, making it 75 years old. It is one of 151 hulls in this registry delivered that year, a cohort whose median tonnage is 722 GT; within it this ship is the 10th largest. Across the whole of the 1950s the registry holds 2,005 vessels, median 960 GT. The median build year across the entire registry is 1995.

The registry attributes 21 vessels to Vickers-Armstrongs, with a median tonnage of 12,653 GT, delivered between 1931 and 2010. See the rest of that yard’s output.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 5030139 this registry holds 18 other vessels, whose median build year is 1951 and which range from 1904 to 1963. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1951.

Its IMO number, 5030139, carries its own check digit. The first six digits are weighted seven down to two and summed — 5×7 + 0×6 + 3×5 + 0×4 + 1×3 + 3×2 = 59 — and the last digit of that total, 9, must equal the seventh digit, 9. It does, so this number is well formed.