At 8,706 gross tons, Mirai is the 37,821st 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 1.5 times the typical vessel on record here. The largest measures 499,167 GT.
Among the 612 research / surveys held here, it ranks 58th by tonnage — larger than 88% 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.
Japan is the country of registry for 2,663 vessels in this directory, of which Mirai is the 486th largest by tonnage. The most common class under that flag is vessels this registry holds no type classification for (1,534 ships), and the median vessel measures 764 GT. Browse every ship flagged Japan.
Narrowing to both dimensions at once, this registry holds 14 research / surveys flying the Japan flag, of which none is larger than Mirai.
Mirai was built in 1969, making it 57 years old. It is one of 814 hulls in this registry delivered that year, a cohort whose median tonnage is 992 GT; within it this ship is the 66th largest. 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 240 vessels to IHI Marine United, with a median tonnage of 52,902 GT, delivered between 1963 and 2013. See the rest of that yard’s output.
At 128.5 m overall, Mirai is 57.5 m longer than the 71.0 m median for research / surveys on record, with a beam of 19.0 m and a draft of 6.9 m.
IMO numbers are issued in broadly chronological blocks. Within 500 either side of 6919423 this registry holds 9 other vessels, whose median build year is 1967 and which range from 1966 to 1969. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1969.
Its IMO number, 6919423, carries its own check digit. The first six digits are weighted seven down to two and summed — 6×7 + 9×6 + 1×5 + 9×4 + 4×3 + 2×2 = 153 — and the last digit of that total, 3, must equal the seventh digit, 3. It does, so this number is well formed.
