Forward position reports if the time differs from the estimate given by more than how many minutes?

The correct answer is based on the standard procedures for reporting forward position discrepancies in aviation. Specifically, if the actual time of arrival at a waypoint deviates from the estimated time of arrival by more than three minutes, it triggers the necessity for a forward position report.

This practice helps maintain safety and situational awareness in air traffic management by ensuring that air traffic controllers and other relevant entities are aware of significant delays or alterations in an aircraft's progress. Such reports enable timely adjustments and facilitate more effective coordination in busy airspace.

The other time thresholds for reporting—one minute, five minutes, and seven minutes—are either too restrictive or too lenient based on the operational standards set within the aviation industry, reinforcing the appropriateness of the three-minute criterion.