RV Polar Duke

At 1,594 gross tons, RV Polar Duke is the 60,847th 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 3.8 times smaller than the typical vessel on record here. The largest measures 499,167 GT.

Among the 612 research / surveys held here, it ranks 283rd by tonnage — larger than 41% of that group. Their median tonnage is 2,180 GT, and the largest tenth begin at 9,452 GT. The flag most often flown by this group is United States (90 ships). The yard that appears most often against it is Wärtsilä, with 36 hulls on record.

The Bahamas is the country of registry for 1,614 vessels in this directory, of which RV Polar Duke is the 1,508th largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (940 ships), and the median vessel measures 30,020 GT. Browse every ship flagged The Bahamas.

Narrowing to both dimensions at once, this registry holds 13 research / surveys flying the The Bahamas flag, of which 11 are larger by tonnage.

RV Polar Duke was built in 1983, making it 43 years old. It is one of 1,578 hulls in this registry delivered that year, a cohort whose median tonnage is 3,112 GT; within it this ship is the 956th largest. Across the whole of the 1980s the registry holds 13,213 vessels, median 3,004 GT. The median build year across the entire registry is 1995.

The registry attributes 8 vessels to Vaagen Verft, with a median tonnage of 2,148 GT, delivered between 1974 and 1986. See the rest of that yard’s output.

At 67.0 m overall, RV Polar Duke is 4.0 m shorter than the 71.0 m median for research / surveys on record, with a beam of 13.0 m and a draft of 5.8 m.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 8200838 this registry holds 39 other vessels, whose median build year is 1983 and which range from 1981 to 1986. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1983.

Its IMO number, 8200838, carries its own check digit. The first six digits are weighted seven down to two and summed — 8×7 + 2×6 + 0×5 + 0×4 + 8×3 + 3×2 = 98 — and the last digit of that total, 8, must equal the seventh digit, 8. It does, so this number is well formed.