USCGC Alert

United States is the country of registry for 2,278 vessels in this directory. 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.

USCGC Alert was built in 1927, making it 99 years old. It is one of 49 hulls in this registry delivered that year, a cohort whose median tonnage is 1,440 GT. 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.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 7516931 this registry holds 40 other vessels, whose median build year is 1976 and which range from 1927 to 1979. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1927.

Its IMO number, 7516931, carries its own check digit. The first six digits are weighted seven down to two and summed — 7×7 + 5×6 + 1×5 + 6×4 + 9×3 + 3×2 = 141 — and the last digit of that total, 1, must equal the seventh digit, 1. It does, so this number is well formed.