P. & I. Bunker Deviation Clause, 1948
The vessel in addition to all other liberties shall have liberty as part of the contract voyage and at any stage thereof to proceed to any port or ports whatsoever whether such ports are on or off the direct and/or customary route or routes to the ports of loading or discharge named in this Charter and there take oil bunkers in any quantity in the discretion of owners even to the full capacity of fuel tanks, deep tanks, and any other compartment in which oil can be carried whether such amount is or is not required for the chartered voyage.