Travelling east does reduce your effective weight, and after a long sequence of confusing mathematics it seems to cause a loaded 747 to effectivly weigh 99.7% of its actual weight. On the flights we do across the Pacific pond easterly from ozland to usland that equates to very roughly 1.2 tonnes of fuel, and that IS a lot of fish.
edited for typos.
[ 08 September 2001: Message edited by: Back Seat Driver ]