1969年国际船舶吨位丈量公约虽然早在1982年7月28日就已经生效,但由于公约对现有船舶规定了适用的宽限期,即自公约生效之日起十二年内,未作实质性改建的现有船舶仍可保留按其国内船舶吨位丈量规则计算的原有吨位,因此,在1994年7月28日以前,该公约并 Although the International Convention on the Measurement of Tonnage of Ships, 1969, entered into force as early as July 28, 1982, the Convention provides for an applicable grace period for existing ships, that is, within 12 years from the date of entry into force of the Convention, no substantive alteration has been made Of the existing vessels may still retain the original tonnage calculated in accordance with the tonnage of ships surveyed in their country of origin and, therefore, before July 28, 1994,