This would be an HUD similar to the one on MC Heli.
The HUD would be an upgrade, like Floaty Bedding or Seats. The recipe would include Glass panes, Lime Dye, Redstone torches, etc.

• At the top, there would be a compass.
  Extra: Compatibility with Xaero's Minimap/World Map's waypoints.
• A coordinate indicator on the left of the screen.
• A heading indicator, to know pitch.
• An HP indicator, which would replace the icons on the hotbar.
• Radar, like the one of this issue. It would be a separate upgrade that requires the HUD upgrade first.
  Extra: In a separate menu, players could be able to select allies and enemies. Allies would appear on the Radar as green dots, Enemies as red dots and unknown players as yellow dots. The color would be customizable in the .config file.

MC Heli HUD: