For simplicity purposes the larger aircraft, for instance a 737 is divided into zones rather than each seat row having a CG arm related to each other. That way if you want to play around with the loading you move the load (pax or cargo) between zones. Usually with the airplanes like J41 that Jim drives or like a PA30 that I get to fly have only one place you can put the cargo. That is not the case with 737s or any other major pax aircraft. Hope this helps.. BAHA Fan of educating Dennis in W&B issues :) -----Original Message----- From: The Airline List [mailto:AIRLINE@LISTSERV.CUNY.EDU]On Behalf Of Dennis W Zeuch Sent: Thursday, May 02, 2002 1:41 PM To: AIRLINE@LISTSERV.CUNY.EDU Subject: Re: Trip Tucson to Portland Oregon In a message dated 5/2/02 5:29:35 PM !!!First Boot!!!, WaterskiPilot@aol.com writes: << Obviously with larger airplanes with belly cargo, >> They mentioned "zones" before take off--- the f/a went down the (narrow) isle with a seating chart marking x;s on the filled seats - about 3/4 full. Saying that after she marked off the zones no one should change seats. (I remember sending 2000 kgs bags of gravel up for h4 on our DC10's some nights) Dennis