SD Impulse

At 319 gross tons, SD Impulse is the 77,562nd 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 19 times smaller than the typical vessel on record here. The largest measures 499,167 GT.

Among the 1,471 tugs held here, it ranks 739th by tonnage — larger than 42% 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.

United Kingdom is the country of registry for 2,394 vessels in this directory, of which SD Impulse is the 1,682nd largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (1,835 ships), and the median vessel measures 2,515 GT. Browse every ship flagged United Kingdom.

Narrowing to both dimensions at once, this registry holds 62 tugs flying the United Kingdom flag, of which 20 are larger by tonnage.

SD Impulse was built in 1993, making it 33 years old. It is one of 1,073 hulls in this registry delivered that year, a cohort whose median tonnage is 3,586 GT; within it this ship is the 955th largest. Across the whole of the 1990s the registry holds 12,006 vessels, median 4,956 GT. The median build year across the entire registry is 1995.

At 32.0 m overall, SD Impulse is within a metre of the 32.3 m median length for tugs on record.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 9050797 this registry holds 42 other vessels, whose median build year is 1993 and which range from 1991 to 1995. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1993.

Its IMO number, 9050797, carries its own check digit. The first six digits are weighted seven down to two and summed — = 127 — and the last digit of that total, 7, must equal the seventh digit, 7. It does, so this number is well formed.