selectable scope range 3–99 nm with dynamic ring labels, climb/descent glyphs, ground traffic now shown but ranked below airborne, auto QNH, server v1.4.0, Credit to @buck5125 for the range menu, track-table work, and the 6502 assembly port that ships as source.

• Hires bitmap scope, 9 nautical mile range with 3/6/9 nm rings.
• Up to 8 simultaneous targets (VIC-II hardware sprite limit), shown as
  numbered diamonds with a directional stem for track/heading.
• Callsign, aircraft type, altitude, and groundspeed for each target.
• Center on any latitude/longitude, or a four-letter ICAO airport code
  (worldwide, via a cached OurAirports lookup).
• The server finds the C64U on the LAN and pushes its own address into a
  small mailbox in C64 memory over the C64 Ultimate's REST API — the server
  address usually just fills itself in, with manual entry (C= + S) as a
  fallback. See server/README.md for how this works.