Glomar Challenger

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 90 research / surveys flying the United States flag.

Glomar Challenger 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. 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 35 vessels to Levingston Shipbuilding Company, with a median tonnage of 2,444 GT, delivered between 1942 and 1982. See the rest of that yard’s output.

At 121.9 m overall, Glomar Challenger is 50.9 m longer than the 71.0 m median for research / surveys on record, with a beam of 65.0 m and a draft of 20.0 m.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 6904636 this registry holds 18 other vessels, whose median build year is 1968 and which range from 1943 to 1969. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1968.

Its IMO number, 6904636, carries its own check digit. The first six digits are weighted seven down to two and summed — 6×7 + 9×6 + 0×5 + 4×4 + 6×3 + 3×2 = 136 — and the last digit of that total, 6, must equal the seventh digit, 6. It does, so this number is well formed.