[AC 91-70A, ¶3-5.b.]
- Circle the waypoint, waypoint number, or symbol to signify that another crewmember independently cross-checks the entry of the coordinates in the navigation computer;
- Tick or diagonally slash the circled waypoint, waypoint number, or symbol to signify the cross-checking of track and distance information within a specified tolerance; and
- Cross out the circled waypoint, waypoint number, or symbol to signify that the aircraft has passed the waypoint. Pilots must verify all navigational information contained in the master document against the best available primary data source. Cross out old waypoints and insert the new information.
NOTE: Some operators use a diagonal line approaching a waypoint to confirm a subsequent waypoint to include coordinates, track, and distance.
[NAT Doc 007, ¶ 8.2.7.]
- The waypoint number is entered against the relevant waypoint coordinates to indicate that the waypoint has been inserted into the navigation computers.
- The waypoint number is circled, to signify that insertion of the correct coordinates in the navigation computers has been double-checked independently by another crew member.
- The circled waypoint number is ticked, to signify that the relevant track and distance information has been double-checked.
- The circled waypoint number is crossed out, to signify that the aircraft has overflown the waypoint concerned.
The waypoint or waypoint number (for aircraft LRNS requiring numbered waypoints) is circled to indicate that the course and distance information has been compared to the plotting chart and its database coordinates have been checked.
A diagonal line will be drawn through the circled waypoint to show that the course and distance displayed in the FMS has been verified against the Master Document and plotting or en route chart.
Following acknowledgement of the position report, a second diagonal line will be drawn through the circled waypoint (creating an “X”) on the Master Document to indicate these duties have been completed.
Portions of this page can be found in the book International Flight Operations, Part VIII, Chapter 39.
Advisory Circular 91-70A, Oceanic and International Operations, 8/12/10, U.S. Department of Transportation
NAT Doc 007, North Atlantic Operations and Airspace Manual Doc 007, Edition 2013