JCG Sarobetsu

At 209 gross tons, JCG Sarobetsu is the 80,586th 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 29 times smaller than the typical vessel on record here. The largest measures 499,167 GT.

Among the 611 naval / patrols held here, it ranks 242nd by tonnage — larger than 10% of that group. Their median tonnage is 1,325 GT, and the largest tenth begin at 23,606 GT. The flag most often flown by this group is United States (136 ships). The yard that appears most often against it is Austal, with 33 hulls on record.

JCG Sarobetsu was built in 2012, making it 14 years old. It is one of 2,747 hulls in this registry delivered that year, a cohort whose median tonnage is 23,456 GT; within it this ship is the 2,615th largest. Across the whole of the 2010s the registry holds 20,111 vessels, median 23,456 GT. The median build year across the entire registry is 1995.

The registry attributes 57 vessels to Mitsubishi Heavy Industries Shimonoseki Shipyard & Machinery Works, with a median tonnage of 3,614 GT, delivered between 1967 and 2026. See the rest of that yard’s output.

At 46.0 m overall, JCG Sarobetsu is 40.5 m shorter than the 86.5 m median for naval / patrols on record.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 9658381 this registry holds 51 other vessels, whose median build year is 2013 and which range from 2011 to 2019. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 2012.

Its IMO number, 9658381, carries its own check digit. The first six digits are weighted seven down to two and summed — 9×7 + 6×6 + 5×5 + 8×4 + 3×3 + 8×2 = 181 — and the last digit of that total, 1, must equal the seventh digit, 1. It does, so this number is well formed.