ALP Defender

At 5,901 gross tons, ALP Defender is the 42,256th largest of the 84,014 vessels in this registry that report a tonnage. The median across that set is 5,994 GT. The largest measures 499,167 GT.

Among the 1,471 tugs held here, it ranks 14th by tonnage — larger than 99% 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.

Netherlands is the country of registry for 1,546 vessels in this directory, of which ALP Defender is the 351st largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (839 ships), and the median vessel measures 2,810 GT. Browse every ship flagged Netherlands.

Narrowing to both dimensions at once, this registry holds 55 tugs flying the Netherlands flag, of which none is larger than ALP Defender.

ALP Defender was built in 2017, making it 9 years old. It is one of 1,468 hulls in this registry delivered that year, a cohort whose median tonnage is 26,213 GT; within it this ship is the 1,041st 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.

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 88.5 m overall, ALP Defender is 56.2 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 9737242 this registry holds 61 other vessels, whose median build year is 2016 and which range from 2014 to 2018. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 2017.

Its IMO number, 9737242, carries its own check digit. The first six digits are weighted seven down to two and summed — 9×7 + 7×6 + 3×5 + 7×4 + 2×3 + 4×2 = 162 — and the last digit of that total, 2, must equal the seventh digit, 2. It does, so this number is well formed.