Garmin Apollo CNX80 Installation Manual

Also see for Apollo CNX80: User Newsletter User Newsletter Supplemental Flight manual Pilot's guide Data list

Appendix B - Serial Interface SpecificationsApollo CNX80 Installation Manual 560-0982-00 Rev D B-9B.2.1.2 Binary Nearest List DataThe nearest waypoint lists are sent one waypoint per data transmission set. The lists are sent in thefollowing order:• LFAC• VOR• NDB• INT• UserThere is a maximum of twenty waypoints per type. The waypoints are a maximum of 600 nm from thecurrent position. The waypoints are order by distance from current position nearest to farthest. Themaximum time to send all lists is 100 seconds. Each list is updated just prior to the first waypoint in the listbeing sent. If a list is empty a shorter record will be sent with the List Item Number set to 0xFF.Table B- 8 - Nearest Waypoint List DataByte Format Description1 Z ‘Z’ Item Designator2 sddddddd List Item Number: Packed, unsigned binary valuess = 1 End of list, 0 all otherddddddd = 1 – 20 list waypoint indexsddddddd = 0xFF List Type is EMPTY (BYTE 4 terminate Item)3 t Waypoint Type:t = {a (airport) || v (VOR) || n (NDB) || i (INT) || u (USER)}4 Cr ‘\r’ Item Terminator <0x0d> (ONLY IF BYTE 2 = OxFF)4-8 ddddd ASCII Waypoint Identifier91011sdddddddxxmmmmmmxhhhhhhhLatitude of waypoint. Packed, unsigned binary values for degrees, minutesand hundredths of minutes.s = 0 North latitude, 1 South latitudex = undefinedddddddd = Latitude degreesmmmmmm = Latitude minuteshhhhhhh = Latitude hundredths of minutes12131415sxxxxxxxddddddddxxmmmmmmxhhhhhhhLongitude of waypoint. Packed, unsigned binary values for degrees, minutesand hundredths of minutes.s = 0 East longitude, 1 West longitudex = undefinedddddddd = Longitude degreesmmmmmm = Longitude minuteshhhhhhh = Longitude hundredths of minutes16 Cr ‘\r’ Item Terminator <0x0d>