T-45C TS INav-01
Review of FLIP and FAA Publications
, shown on Jet Routes, depict distances between NAVAIDs and/or between
reporting points. Distances between fixes on Direct legs, or distances along only a portion of a Jet Route
segment, can be measured by using a straight edge, marking off the distance, and applying the marked off
distance to the convenient 250-nm scale at either the top or bottom of your particular chart. The scale is
divided into 50-nm increments, with one increment subdivided into 5-nm increments. Some mileages are
provided between other than reporting points, which are NOT in boxes.
1" = 30 NM
Many times, the paths of two or more jet routes will coincide on the chart with the J being printed only
You should file for the jet route which extends farthest along your planned profile of flight.
The High Altitude Charts depict the jet route system - 18,000 ft MSL through flight level 450, which is
contained within Class A airspace; therefore, all MINIMUM EN ROUTE ALTITUDES (MEAs) are 18,000 ft
MSL unless depicted as higher on a route segment.
MAXIMUM AUTHORIZED ALTITUDE (MAA) is depicted on a route segment when lower than FL 450.
MAA assures adequate NAVAID signal reception for the entire route segment of a designated jet route,
that is, it prevents co-channeling interference. Flights above the MAA must be filed as DIRECT.
A route segment may extend:
1. Between NAVAIDs
2. Between a NAVAID and an endpoint, which is a DME fix depicted by a vertical black line across
3. Between two endpoints
Unless designated by a MINIMUM CROSSING ALTITUDE (MCA), climbs and descents are commenced
where the segment begins or ends with obstruction clearance based on standard climb rates.