Chokaisan

At 160,131 gross tons, Chokaisan is the 805th 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 27 times the typical vessel on record here. The largest measures 499,167 GT.

Among the 3,060 oil tankers held here, it ranks 129th by tonnage — larger than 96% 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.

Japan is the country of registry for 2,663 vessels in this directory, of which Chokaisan is the 17th largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (1,534 ships), and the median vessel measures 764 GT. Browse every ship flagged Japan.

Narrowing to both dimensions at once, this registry holds 156 oil tankers flying the Japan flag, of which 5 are larger by tonnage.

Chokaisan was built in 2011, making it 15 years old. It is one of 2,848 hulls in this registry delivered that year, a cohort whose median tonnage is 23,456 GT; within it this ship is the 40th largest. Across the whole of the 2010s the registry holds 20,111 vessels, median 23,456 GT. The median build year across the entire registry is 1995.

At 333.0 m overall, Chokaisan is 154.0 m longer than the 179.0 m median for oil tankers on record.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 9562685 this registry holds 40 other vessels, whose median build year is 2010 and which range from 2008 to 2014. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 2011.

Its IMO number, 9562685, carries its own check digit. The first six digits are weighted seven down to two and summed — 9×7 = 165 — and the last digit of that total, 5, must equal the seventh digit, 5. It does, so this number is well formed.