T-45C TS INav-08
Fuel, Weather, and Alternate Airfield Planning
Question 4 126.96.36.199
For planning purposes, if your destination weather is at or above published minimums but
below 3,000-3, forecast weather must be __________ , for a non-precision approach at your
EXCEPTIONS TO BASIC FILING CRITERIA
For reasons of safety, previous editions of OPNAVINST 3710.7 added two requirements to the basic
filing criteria to provide for the exceptional event that you 1) experience total radio failure when flying IFR
to a radar only airfield or one without a TACAN, VOR, or ILS approach, or 2) you must execute a
missed approach with radio failure at your destination and proceed at minimum en route altitude to an
alternate that does not have a published TACAN, VOR, or ILS approach.
The current edition of OPNAVINST 3710.7 does not include these requirements, but good headwork
and safety considerations would indicate these rules should be adhered to.
Regardless of weather conditions, if you are filing to a destination without aircraft compatible
NAVAIDs, a suitable alternate must have a published approach that you can fly without the use of
two-way radio communications.
If the alternate does not have a published approach compatible with your aircraft equipment, the
forecast weather must allow for descent and landing in visual meteorological conditions (VMC)
from the lowest minimum en route altitude.
Question 5 188.8.131.52
Do OPNAVINST 3710.7 filing minimums apply after a missed approach at your destination?
DETERMINING FUEL REQUIREMENTS FOR ROUTE OF FLIGHT 184.108.40.206
To determine the fuel requirements for each stage of flight, apply OPNAVINST 3710.7 minimum fuel
criteria. These criteria ensure that you will have sufficient usable fuel (and a margin for safety) to execute
your flight plan. The following excerpt from OPNAVINST 3710.7, paragraph 4.6.4, fully states the
minimum fuel requirements for naval aircraft.