Seawise Giant

At 260,941 gross tons, Seawise Giant is the 4th 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 44 times the typical vessel on record here. The largest measures 499,167 GT.

Among the 3,060 oil tankers held here, it ranks 2nd by tonnage — larger than 100% of that group. Their median tonnage is 22,184 GT, and the largest tenth begin at 149,274 GT. The flag most often flown by this group is Panama (301 ships). The yard that appears most often against it is HD Hyundai Mipo, with 190 hulls on record.

Seawise Giant was built in 1979, making it 47 years old. It is one of 1,718 hulls in this registry delivered that year, a cohort whose median tonnage is 2,382 GT; within it this ship is the 1st 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.

The registry attributes 161 vessels to Sumitomo Heavy Industries, with a median tonnage of 51,956 GT, delivered between 1959 and 2022. See the rest of that yard’s output.

At 458.4 m overall, Seawise Giant is 279.4 m longer than the 179.0 m median for oil tankers on record, with a beam of 68.8 m and a draft of 24.6 m.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 7381154 this registry holds 74 other vessels, whose median build year is 1975 and which range from 1973 to 1979. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1979.

Its IMO number, 7381154, carries its own check digit. The first six digits are weighted seven down to two and summed — 7×7 + 3×6 + 8×5 + 1×4 + 1×3 + 5×2 = 124 — and the last digit of that total, 4, must equal the seventh digit, 4. It does, so this number is well formed.