288. Proceeding 'so near to port of discharge as the ship can safely get': what amounts to obstruction.

It is the shipowner's duty to proceed on the original voyage until prevented from proceeding any further by some permanent obstruction1, which may be either physical2 or political3. Permanence is a relative term: there must, in every case, be some limit of time beyond which a continuing obstacle ceases to be temporary4. Impediments arising in the ordinary course of navigation5, or in the usual and ordinary course of management of a particular port6, and not lasting more than a reasonable time are not permanent; in such cases the ship must wait until the obstruction has ceased to exist