9.38. Range Estimation. Table 9.3. Table 9.3. gives suitable range estimation cues. Some of the cockpit tools used to compare aircraft size includes the AOA indexer and the standby magnetic compass. Externally, the anti-collision strobe light flash guard on the leading edge of the wingtip also provides a good, fixed reference to estimate range.

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Table 9.3. Range Estimation. Range Other aircraft is: Other 300 feet Width of AOA indexer turned sideways Detail visible (e.g., canopy or standby magnetic compass. details, pilots, etc.). Tail flash easily readable (letters clearer than numbers). 500 feet 2/3 width of AOA indexer turned Normal fingertip references sideways or 2/3 width of standby apparent. Canopy detail magnetic compass. Aircraft size discernible. Letters on tail are approximates four times the size of the discernible (numbers barely discernible). wingtip anti-collision strobe flash guard. 1,000 feet Approximately twice the size of the Tail flash not visible. wingtip anti-collision strobe flash guard.

Table 9.3 (PDF p. 214)