INSTRUMENT FLIGHT RULES WORKBOOK
pilot to ATC so that a clearance may be issued for the flight. Secondly, it provides search and
rescue facilities the necessary information on the planned route of flight, should it be needed.
OPNAVINST 3710.7 also states the following:
1. Delivery of a properly prepared flight plan form to duty personnel at an established Base
Operations Office at the point of departure assures that the appropriate ARTCC/FSS will be
furnished with the essential elements of the flight plan and that a takeoff report will be made.
2. If no communications link exists between the point of departure and the ARTCC/FSS, the
pilot may relay the flight plan to an appropriate FSS by commercial telephone. When unable to
file in person or by telephone, the flight plan may be filed by radio as soon as possible after
takeoff. However, flight in controlled airspace in IMC weather conditions without an ATC
clearance is prohibited.
Where airfield used is shared by both a military and a civil activity, the flight plan shall be
submitted at the military installation. (At most civil airports without a military tenant, the pilot
will file the flight plan with FSS via a direct telephone line.)
Figure 4-13 DD 175
INSTRUMENT FLIGHT RULES 4-13