Sanderus

At 4,782 gross tons, Sanderus is the 45,176th 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 1.3 times smaller than the typical vessel on record here. The largest measures 499,167 GT.

Among the 360 dredgers held here, it ranks 99th by tonnage — larger than 72% of that group. Their median tonnage is 2,086 GT, and the largest tenth begin at 11,701 GT. The flag most often flown by this group is People's Republic of China (43 ships). The yard that appears most often against it is Royal IHC, with 21 hulls on record.

Sanderus was built in 1968, making it 58 years old. It is one of 536 hulls in this registry delivered that year, a cohort whose median tonnage is 769 GT; within it this ship is the 43rd largest. 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 1 vessels to Werf De Klop, with a median tonnage of 4,782 GT, delivered between 1968 and 1968. See the rest of that yard’s output.

At 103.0 m overall, Sanderus is 23.0 m longer than the 80.0 m median for dredgers on record.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 6829795 this registry holds 2 other vessels, whose median build year is 1968. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1968.

Its IMO number, 6829795, carries its own check digit. The first six digits are weighted seven down to two and summed — 6×7 + 8×6 + 2×5 + 9×4 + 7×3 + 9×2 = 175 — and the last digit of that total, 5, must equal the seventh digit, 5. It does, so this number is well formed.