On Sun, 5 Dec 2004 06:42:51 -0600, "Dan Luke"
wrote in
::

... so that [they] always have full tanks," which is a silly
practice unless one ALWAYS knows the next flight will require full
tanks.

The practice of topping the fuel tanks after each flight rests on the
notion that air contains a certain amount of moisture, and that the
water will condense out of the air contained in partially emptied
tanks and contaminate the aircraft's fuel system.