Matsu Maru No.3

At 497 gross tons, Matsu Maru No.3 is the 73,781st 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 12 times smaller than 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 41,419th by tonnage — larger than 16% 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.

Matsu Maru No.3 was built in 1983, making it 43 years old. It is one of 1,578 hulls in this registry delivered that year, a cohort whose median tonnage is 3,112 GT; within it this ship is the 1,275th largest. Across the whole of the 1980s the registry holds 13,213 vessels, median 3,004 GT. The median build year across the entire registry is 1995.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 8214657 this registry holds 41 other vessels, whose median build year is 1982 and which range from 1982 to 1985. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1983.

Its IMO number, 8214657, carries its own check digit. The first six digits are weighted seven down to two and summed — 8×7 + 2×6 + 1×5 + 4×4 + 6×3 + 5×2 = 117 — and the last digit of that total, 7, must equal the seventh digit, 7. It does, so this number is well formed.