11. At the time of the accident, both aircraft were operating under visual flight rules. 12. Flight is only permitted during daylight with visual flight rules. 13. Syed Abdul Hadi will use regular maps and navigational skills ( Visual Flight Rules ). 14. Therefore, the route could only use visual flight rules. 15. Weather at the time of the accident was marginally good enough for visual flight rules. 16. There was no restriction on visual flight rules traffic. 17. _Federal aviation officials reopen the nation's rural airspace to small planes operating under visual flight rules. 18. But since he was flying under visual flight rules, he was not required to do so. 19. For pilots, knowledge of the sky cover helps determine if visual flight rules are being met. 20. IMC exists when weather conditions are below those prescribed for Visual Flight Rules ( VFR ).