At 14,671 gross tons, USS Chiwawa is the 31,197th 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 2.4 times the typical vessel on record here. The largest measures 499,167 GT.
Among the 611 naval / patrols held here, it ranks 41st by tonnage — larger than 85% of that group. Their median tonnage is 1,325 GT, and the largest tenth begin at 23,606 GT. The flag most often flown by this group is United States (136 ships). The yard that appears most often against it is Austal, with 33 hulls on record.
United States is the country of registry for 2,278 vessels in this directory, of which USS Chiwawa is the 282nd largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (977 ships), and the median vessel measures 1,706 GT. Browse every ship flagged United States.
Narrowing to both dimensions at once, this registry holds 136 naval / patrols flying the United States flag, of which 20 are larger by tonnage.
USS Chiwawa was built in 1942, making it 84 years old. It is one of 65 hulls in this registry delivered that year, a cohort whose median tonnage is 7,025 GT; within it this ship is the 1st largest. Across the whole of the 1940s the registry holds 1,039 vessels, median 4,053 GT. The median build year across the entire registry is 1995.
The registry attributes 4 vessels to Bethlehem Hingham Shipyard, with a median tonnage of 14,671 GT, delivered between 1942 and 1945. See the rest of that yard’s output.
At 252.0 m overall, USS Chiwawa is 165.5 m longer than the 86.5 m median for naval / patrols on record, with a beam of 68.0 m and a draft of 29.0 m.
IMO numbers are issued in broadly chronological blocks. Within 500 either side of 5385625 this registry holds 11 other vessels, whose median build year is 1952 and which range from 1932 to 1962. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1942.
Its IMO number, 5385625, carries its own check digit. The first six digits are weighted seven down to two and summed — 5×7 + 3×6 + 8×5 + 5×4 + 6×3 + 2×2 = 135 — and the last digit of that total, 5, must equal the seventh digit, 5. It does, so this number is well formed.
