Diamond Reef

At 527 gross tons, Diamond Reef is the 72,815th 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 11 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 40,771st by tonnage — larger than 18% 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.

Diamond Reef was built in 1968, making it 58 years old. It is one of 536 hulls in this registry delivered that year, a cohort whose median tonnage is 769 GT; within it this ship is the 229th largest. Across the whole of the 1960s the registry holds 4,074 vessels, median 844 GT. The median build year across the entire registry is 1995.

At 47.0 m overall, Diamond Reef is 68.0 m shorter than the 115.0 m median for vessels this registry holds no type classification for on record.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 7200233 this registry holds 20 other vessels, whose median build year is 1965 and which range from 1923 to 1968. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1968.

Its IMO number, 7200233, carries its own check digit. The first six digits are weighted seven down to two and summed — 7×7 + 2×6 + 0×5 + 0×4 + 2×3 + 3×2 = 73 — and the last digit of that total, 3, must equal the seventh digit, 3. It does, so this number is well formed.