Niassa

Niassa was built in 1969, making it 57 years old. It is one of 814 hulls in this registry delivered that year, a cohort whose median tonnage is 992 GT. Across the whole of the 1960s the registry holds 4,074 vessels, median 844 GT. The median build year across the entire registry is 1995.

The registry attributes 6 vessels to Cockerill-Sambre, with a median tonnage of 23,936 GT, delivered between 1959 and 1975. See the rest of that yard’s output.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 5250636 this registry holds 7 other vessels, whose median build year is 1949 and which range from 1922 to 1969. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1969.

Its IMO number, 5250636, carries its own check digit. The first six digits are weighted seven down to two and summed — 5×7 + 2×6 + 5×5 + 0×4 + 6×3 + 3×2 = 96 — and the last digit of that total, 6, must equal the seventh digit, 6. It does, so this number is well formed.