IMO 8521153

At 145 gross tons, IMO 8521153 is the 82,440th 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 41 times smaller than the typical vessel on record here. The largest measures 499,167 GT.

Among the 1,471 tugs held here, it ranks 1,134th by tonnage — larger than 10% 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.

Spain is the country of registry for 720 vessels in this directory, of which IMO 8521153 is the 633rd largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (483 ships), and the median vessel measures 452 GT. Browse every ship flagged Spain.

Narrowing to both dimensions at once, this registry holds 28 tugs flying the Spain flag, of which 22 are larger by tonnage.

IMO 8521153 was built in 1988, making it 38 years old. It is one of 920 hulls in this registry delivered that year, a cohort whose median tonnage is 1,512 GT; within it this ship is the 846th largest. Across the whole of the 1980s the registry holds 13,213 vessels, median 3,004 GT. The median build year across the entire registry is 1995.

At 27.0 m overall, IMO 8521153 is 5.3 m shorter than the 32.3 m median for tugs on record, with a beam of 9.1 m and a draft of 3.2 m.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 8521153 this registry holds 32 other vessels, whose median build year is 1987 and which range from 1985 to 1991. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1988.

Its IMO number, 8521153, carries its own check digit. The first six digits are weighted seven down to two and summed — 8×7 + 5×6 + 2×5 + 1×4 + 1×3 + 5×2 = 113 — and the last digit of that total, 3, must equal the seventh digit, 3. It does, so this number is well formed.