Boka Sherpa

At 3,239 gross tons, Boka Sherpa is the 50,714th 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 1.9 times smaller than the typical vessel on record here. The largest measures 499,167 GT.

Among the 1,471 tugs held here, it ranks 51st by tonnage — larger than 96% 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.

Malta is the country of registry for 2,640 vessels in this directory, of which Boka Sherpa is the 2,247th largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (1,614 ships), and the median vessel measures 23,204 GT. Browse every ship flagged Malta.

Narrowing to both dimensions at once, this registry holds 16 tugs flying the Malta flag, of which 1 is larger by tonnage.

Boka Sherpa was built in 2005, making it 21 years old. It is one of 1,690 hulls in this registry delivered that year, a cohort whose median tonnage is 12,046 GT; within it this ship is the 1,133rd 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.

The registry attributes 88 vessels to Niigata Shipbuilding & Repair, with a median tonnage of 674 GT, delivered between 1971 and 2017. See the rest of that yard’s output.

At 75.0 m overall, Boka Sherpa is 42.7 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 9315563 this registry holds 75 other vessels, whose median build year is 2006 and which range from 2004 to 2007. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 2005.

Its IMO number, 9315563, carries its own check digit. The first six digits are weighted seven down to two and summed — 9×7 + 3×6 + 1×5 + 5×4 + 5×3 + 6×2 = 133 — and the last digit of that total, 3, must equal the seventh digit, 3. It does, so this number is well formed.