container check digit

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Enter container number to calculate check digit according to ISO 6346:1995. Check digit will be calculated even if container number already contains it

The check digit is there to pick up any errors which might be caused by incorrect transcription of the registration number. It does not matter where in the world you are, if you have a wrong check digit you have an invalid container number and an invalid container number is impossible to trace through the seafreight shipping process.