1. The initial " Type 271 " primarily found service on plan-position indicator . 2. These include radar, the plan position indicator radar display, and the bathythermograph. 3. A plan-position indicator ( PPI ) display was added in 1943. 4. His electronic position indicator beacon activated, sparking an international search and rescue effort. 5. Bathymetric mapping sonar, the Inmarsat satellite communications system, and a Global Position Indicator . 6. The main application of scotophors was in plan position indicators , specialized military radar displays. 7. The primary human interface for the tracking algorithm is a planned position indicator display. 8. The plan position indicator and scrolling notifications are automatic and require no user action. 9. Such a display is called a Plan Position Indicator , usually simply a " PPI ". 10. Some models also have gear position indicators for all gear positions at the instrument panel.
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