Britoil 81

At 2,049 gross tons, Britoil 81 is the 57,509th 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 2.9 times smaller than the typical vessel on record here. The largest measures 499,167 GT.

Among the 1,471 tugs held here, it ranks 103rd by tonnage — larger than 92% of that group. Their median tonnage is 393 GT, and the largest tenth begin at 1,733 GT. The flag most often flown by this group is United States (239 ships). The yard that appears most often against it is Damen Shipyards Gorinchem, with 62 hulls on record.

Singapore is the country of registry for 2,873 vessels in this directory, of which Britoil 81 is the 2,418th largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (1,799 ships), and the median vessel measures 20,927 GT. Browse every ship flagged Singapore.

Narrowing to both dimensions at once, this registry holds 64 tugs flying the Singapore flag, of which 7 are larger by tonnage.

Britoil 81 was built in 2010, making it 16 years old. It is one of 3,028 hulls in this registry delivered that year, a cohort whose median tonnage is 20,204 GT; within it this ship is the 2,463rd 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 56.0 m overall, Britoil 81 is 23.7 m longer than the 32.3 m median for tugs on record.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 9538684 this registry holds 59 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 2010.

Its IMO number, 9538684, carries its own check digit. The first six digits are weighted seven down to two and summed — = 174 — and the last digit of that total, 4, must equal the seventh digit, 4. It does, so this number is well formed.