Posidon

At 57,684 gross tons, Posidon is the 8,473rd 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 9.6 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 4,714th by tonnage — larger than 91% 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.

Posidon was built in 1976, making it 50 years old. It is one of 1,812 hulls in this registry delivered that year, a cohort whose median tonnage is 4,484 GT; within it this ship is the 126th largest. Across the whole of the 1970s the registry holds 17,331 vessels, median 2,774 GT. The median build year across the entire registry is 1995.

At 258.0 m overall, Posidon is 143.0 m longer 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 7370648 this registry holds 69 other vessels, whose median build year is 1975 and which range from 1973 to 1977. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1976.

Its IMO number, 7370648, carries its own check digit. The first six digits are weighted seven down to two and summed — 7×7 + 3×6 + 7×5 + 0×4 + 6×3 + 4×2 = 128 — and the last digit of that total, 8, must equal the seventh digit, 8. It does, so this number is well formed.