USNS Vanguard

At 15,309 gross tons, USNS Vanguard is the 30,738th 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 2.6 times the typical vessel on record here. The largest measures 499,167 GT.

Among the 611 naval / patrols held here, it ranks 40th 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 USNS Vanguard is the 277th 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 19 are larger by tonnage.

USNS Vanguard was built in 1944, making it 82 years old. It is one of 174 hulls in this registry delivered that year, a cohort whose median tonnage is 7,176 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 18 vessels to Marinship, with a median tonnage of 14,770 GT, delivered between 1943 and 1966. See the rest of that yard’s output.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 8835607 this registry holds 49 other vessels, whose median build year is 1984 and which range from 1927 to 1990. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1944.

Its IMO number, 8835607, carries its own check digit. The first six digits are weighted seven down to two and summed — 8×7 + 8×6 + 3×5 + 5×4 + 6×3 + 0×2 = 157 — and the last digit of that total, 7, must equal the seventh digit, 7. It does, so this number is well formed.