Added
- Balloons get their own icon. High-altitude balloons show up on ADS-B
more often than you'd think — a round envelope drifting at FL500 at 20
knots — and until now they wore the same chevron as a jet, pointing a
heading a balloon doesn't have. Lighter-than-air contacts now draw as an
envelope-with-basket glyph on the Live radar and both display-board radar
layouts, heading-agnostic like the helicopter's rotor disc and
altitude-colored like every other contact; the radar legend gained a
matching row. A contact counts as a balloon when it broadcasts emitter
category B2 (lighter-than-air), carries the BALL or SHIP type designator,
or flies a known balloon-fleet callsign (HBAL/NSL) — the fallbacks matter
because many balloons transmit no category and a junk type, and a
spec-only check would leave them drawn as jets. Suggested by a user who
watched one drift over at FL352.