Seadrill T 9

At 10,708 gross tons, Seadrill T 9 is the 34,893rd 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 1.8 times the typical vessel on record here. The largest measures 499,167 GT.

Among the 1,423 offshore supplys held here, it ranks 56th by tonnage — larger than 96% of that group. Their median tonnage is 2,061 GT, and the largest tenth begin at 4,961 GT. The flag most often flown by this group is United States (283 ships). The yard that appears most often against it is North American Shipbuilding, with 55 hulls on record.

Panama is the country of registry for 9,598 vessels in this directory, of which Seadrill T 9 is the 5,924th largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (5,698 ships), and the median vessel measures 18,203 GT. Browse every ship flagged Panama.

Narrowing to both dimensions at once, this registry holds 69 offshore supplys flying the Panama flag, of which 11 are larger by tonnage.

Seadrill T 9 was built in 2004, making it 22 years old. It is one of 1,485 hulls in this registry delivered that year, a cohort whose median tonnage is 17,188 GT; within it this ship is the 777th largest. Across the whole of the 2000s the registry holds 18,605 vessels, median 9,957 GT. The median build year across the entire registry is 1995.

At 98.0 m overall, Seadrill T 9 is 30.9 m longer than the 67.1 m median for offshore supplys on record.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 8771631 this registry holds 54 other vessels, whose median build year is 2013 and which range from 1957 to 2016. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 2004.

Its IMO number, 8771631, carries its own check digit. The first six digits are weighted seven down to two and summed — 8×7 + 7×6 + 7×5 + 1×4 + 6×3 + 3×2 = 161 — and the last digit of that total, 1, must equal the seventh digit, 1. It does, so this number is well formed.