certificate of tonnage - a document issued by the competent authorities and delivered to the ship stating the vessel's name and nationality, port of registry, principal dimensions; and all particulars of the under-deck tonnage, the items included in the gross tonnage and those items which have been deducted in order to obtain the net register tonnage; also, particulars of all spaces which have been exempted from measurement, mõõdukiri - tsiviillaeva mahutavust (bruto, neto) ja peamõõtmeid tõestav laevadokument; selle väljastab valitsusasutus või valitsuse volitatud klassifikatsiooniühing