JCG Esan

JCG Esan was built in 1978, making it 48 years old. It is one of 1,698 hulls in this registry delivered that year, a cohort whose median tonnage is 3,556 GT. Across the whole of the 1970s the registry holds 17,331 vessels, median 2,774 GT. The median build year across the entire registry is 1995.

The registry attributes 161 vessels to Sumitomo Heavy Industries, with a median tonnage of 51,956 GT, delivered between 1959 and 2022. See the rest of that yard’s output.

At 77.8 m overall, JCG Esan is 8.7 m shorter than the 86.5 m median for naval / patrols on record, with a beam of 9.6 m and a draft of 5.3 m.

IMO numbers are issued in broadly chronological blocks. Within 500 either side of 7809144 this registry holds 41 other vessels, whose median build year is 1978 and which range from 1978 to 1993. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1978.

Its IMO number, 7809144, carries its own check digit. The first six digits are weighted seven down to two and summed — 7×7 + 8×6 + 0×5 + 9×4 + 1×3 + 4×2 = 144 — and the last digit of that total, 4, must equal the seventh digit, 4. It does, so this number is well formed.