I'm not sure where your coming from with that question? Be it a 777, 767, 747 or any other Boeing product, it would be the same. I was thinking along the lines of how your paper flight plan was produced and the way the crew did it's waypoint passage procedures. If your flght plan is built using magnetic headings then the point becomes somewhat moot. If on the otherhand you are using true data it presents a more logical presentation on both the chart and the FMS. Keep in mind that the FMS/GPS is using one mag var data base, the flight plan computer uses another mag var data base and so on. By using true, you eliminate the small but none the less real differences along your route of flight. If on the other hand your one of those who just engaes LNAV and never cross checks the navigation process, all the above is meaningless.
