At 929 gross tons, SF Ammonia is the 66,805th 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 6.5 times smaller than the typical vessel on record here. The largest measures 499,167 GT.
Among the 1,234 ferrys held here, it ranks 667th by tonnage — larger than 24% of that group. Their median tonnage is 3,908 GT, and the largest tenth begin at 25,454 GT. The flag most often flown by this group is Japan (241 ships). The yard that appears most often against it is Mitsubishi Heavy Industries, with 34 hulls on record.
Norway is the country of registry for 3,032 vessels in this directory, of which SF Ammonia is the 1,808th largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (2,126 ships), and the median vessel measures 3,102 GT. Browse every ship flagged Norway.
Narrowing to both dimensions at once, this registry holds 188 ferrys flying the Norway flag, of which 116 are larger by tonnage.
SF Ammonia was built in 1929, making it 97 years old. It is one of 66 hulls in this registry delivered that year, a cohort whose median tonnage is 2,456 GT; within it this ship is the 26th largest. Across the whole of the 1920s the registry holds 516 vessels, median 2,350 GT. The median build year across the entire registry is 1995.
The registry attributes 35 vessels to Moss Verft, with a median tonnage of 6,300 GT, delivered between 1929 and 2015. See the rest of that yard’s output.
At 73.5 m overall, SF Ammonia is 30.5 m shorter than the 104.0 m median for ferrys on record, with a beam of 9.5 m and a draft of 3.9 m.
IMO numbers are issued in broadly chronological blocks. Within 500 either side of 8959908 this registry holds 54 other vessels, whose median build year is 1973 and which range from 1915 to 2000. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1929.
Its IMO number, 8959908, carries its own check digit. The first six digits are weighted seven down to two and summed — 8×7 + 9×6 + 5×5 + 9×4 + 9×3 + 0×2 = 198 — and the last digit of that total, 8, must equal the seventh digit, 8. It does, so this number is well formed.
