Discoverer Enterprise

At 63,190 gross tons, Discoverer Enterprise is the 7,346th 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 11 times the typical vessel on record here. The largest measures 499,167 GT.

Among the 911 rig / offshore units held here, it ranks 38th by tonnage — larger than 95% of that group. Their median tonnage is 9,254 GT, and the largest tenth begin at 51,732 GT. The flag most often flown by this group is Liberia (179 ships). The yard that appears most often against it is Hanwha Ocean, with 27 hulls on record.

Discoverer Enterprise was built in 1998, making it 28 years old. It is one of 1,367 hulls in this registry delivered that year, a cohort whose median tonnage is 7,381 GT; within it this ship is the 78th largest. Across the whole of the 1990s the registry holds 12,006 vessels, median 4,956 GT. The median build year across the entire registry is 1995.

The registry attributes 1 vessels to * Astilleros y Talleres del Noroeste (ASTANO), Fene, Spain, with a median tonnage of 63,190 GT, delivered between 1998 and 1998. See the rest of that yard’s output.

At 251.0 m overall, Discoverer Enterprise is 177.0 m longer than the 74.0 m median for rig / offshore units on record, with a beam of 38.0 m and a draft of 13.0 m.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 9186792 this registry holds 60 other vessels, whose median build year is 1999 and which range from 1998 to 2000. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1998.

Its IMO number, 9186792, carries its own check digit. The first six digits are weighted seven down to two and summed — 9×7 + 1×6 + 8×5 + 6×4 + 7×3 + 9×2 = 172 — and the last digit of that total, 2, must equal the seventh digit, 2. It does, so this number is well formed.