81. Route distance is 220 NM, planned GS 120 kt, departure 1200 UTC. After 70 NM the aircraft is 5 min ahead. What revised ETA is indicated?
Answer
1335 UTC
Explanation
Being five minutes ahead at the checkpoint indicates actual progress is faster than planned; using the revised groundspeed for the remaining route gives the source answer **1335 UTC**. **Key takeaway:** Update ETA from observed progress, not only the original plan. **Glossary:** ETA: estimated time of arrival.