IMO number

IMO resolutions (1987–2017) In 1987 the IMO adopted Resolution A.600(15) to create the IMO ship identification number scheme aimed at the "enhancement of maritime safety and pollution prevention and the prevention of maritime fraud" by assigning to each ship a unique permanent identification number. Lloyd's Register had already introduced permanent numbers for all the ships in their published register in 1963, and these were modified to seven-digit numbers in 1969. It is this number series that was adopted as the basis for IMO ship numbers in 1987. The original resolution applied to cargo vessels (meaning "ships which are not passenger ships") of at least 300 gt and passenger vessels of at least 100 gt. Although not mandatory under SOLAS, since IMO ship numbers became available also to fishing vessels in 2013, some regional fisheries management organisations, the European Union and other organizations or states have made them mandatory for fishing vessels above a certain size. SOLAS regulation (1994) SOLAS regulation XI-1/3 was adopted in 1994 and came into force on 1 January 1996, making IMO ship numbers mandatory for those countries that have ratified (or acceded to, accepted, approved, adopted, etc.) SOLAS. The IMO scheme and hence SOLAS regulation does not apply to: The regulation provides that every ship owner and management company shall have a unique identification number. Other amendments require these numbers to be added to the relevant certificates and documents in the International Safety Management Code (ISM) and the International Ship and Port Facility Security Code (ISPS). == Assignment ==

S&P Global is the manager of the scheme and, as such, identifies and assigns IMO numbers without charge. and commercial yachts. In the event a ship's hull is split apart, the IMO number continues with the portion surrounding the engines. == Structure ==

IMO number of a vessel An IMO number is made of the three letters "IMO" followed by a seven-digit number. This consists of a six-digit sequential unique number followed by a check digit. The integrity of an IMO number can be verified using its check digit. The checksum of an IMO ship identification number is calculated by multiplying each of the first six digits by a factor of 7 to 2 corresponding to their position from right to left. The rightmost digit of this sum is the check digit. Example for IMO 9074729: :(9×7) + (0×6) + (7×5) + (4×4) + (7×3) + (2×2) = 139. IMO number of a company The checksum of an IMO company and registered owner identification number is calculated somewhat differently. The first six digits are multiplied by the respective weights: 8, 6, 4, 2, 9, and 7 and then summed. From this sum modulo 11 is taken. The result of which is subtracted from 11. And modulo 10 of this difference results in the check digit. Example for company IMO 2041999: :\begin{align}\mbox{check digit} &= (11 - (2 \times 8 + 0 \times 6 + 4 \times 4 + 1 \times 2 + 9 \times 9 + 9 \times 7) \bmod 11) \bmod 10 \\ &= (11 - (16 + 0 + 16 + 2 + 81 + 63) \bmod 11) \bmod 10 \\ &= (11 - 178 \bmod 11) \bmod 10 \\ &= (11 - 2) \bmod 10 \\ &= 9 \bmod 10 = 9 \end{align} == See also ==