1. :: The weird invisible character is a Unicode Bi-directional text direction indicator . 2. In some aircraft, a pilot direction indicator would be used. 3. Electric direction indicators were now built into the body pillars. 4. These invisible unicode characters are text direction indicators that are displayed in some contexts. 5. A heater was available as an option as was a rev counter and more surprisingly, direction indicators . 6. There was an airflow direction indicator mounted on a little boom which projected forward of the starboard wing. 7. Visual flight rules ( VFR ) require an airspeed indicator, an altimeter, and a compass or other suitable magnetic direction indicator . 8. Direction indicators , a set of three coloured lights on each side of the car visible from front and rear were fitted.9. In its road test " The Times " commented favourably on the direction indicators though it noted the lack of ashtrays. 10. Early examples, and most used by the Navy, had an output that directly drove a Pilot Direction Indicator meter in the cockpit.