1. Numbered symbols ( called'visual indicators ') on the cartridge end indicate the status: 2. Some aircraft provide a visual indicator of propeller synchronization in the cockpit. 3. Also, runway 31 has a PAPI visual indicator of glide path. 4. Instead, it serves as a visual indicator of how much time is remaining. 5. This mechanic provided a visual indicator of how powerful the player character was becoming. 6. When it detects the driver falling asleep, it sends a series of tones and visual indicators . 7. :Titrations based on visual indicators are best done so there is an abrupt, noticible color change. 8. It is a visual indicator of social position, religious affiliation, marital status and, increasingly, of personal wealth and taste. 9. Dashboards are usually a series of graphics, charts, gauges and other visual indicators that can be monitored and interpreted. 10. A visual indicator was developed based on vibrating reeds, which provided a simple panel-mounted " turn left-right " indicator.