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|  Solution:
1.
Estimate the answer. Convert 250 Kts to 4 NM/Min (round 250 to 240 and divide by
60). The time will be slightly over 1 minute.
2.
Place the 250 KTS ground speed information on the DISTANCE scale directly
above the "SEC" index (or high-speed index) on the TIME scale.
3.
Opposite the 50 (representing 5 NM) on the DISTANCE scale, read the time to the
station on the TIME scale. (Figure 4.3-18)
Figure 4.3-18 Time 3
Answer:
72 seconds, or 1 minute and 12 seconds (1:12). (Figure 4.3-19)
Figure 4.3-19 Time 4
4.6-66
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