IMG_DIR, hideBox: true }, opts)
    );

    const fiAirspeed   = mk('#fi-airspeed',   FlightIndicators.TYPE_AIRSPEED);
    const fiAttitude   = mk('#fi-attitude',   FlightIndicators.TYPE_ATTITUDE);
    const fiAltimeter  = mk('#fi-altimeter',  FlightIndicators.TYPE_ALTIMETER, { pressure: 1013 });
    const fiHeading    = mk('#fi-heading',    FlightIndicators.TYPE_HEADING);
    const fiVertical   = mk('#fi-vertical',   FlightIndicators.TYPE_VERTICAL_SPEED);
    const fiCoordinator= mk('#fi-coordinator',Fligh