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AIM

10/12/17

5−1−13

Preflight

b. Airways and Jet Routes Depiction on Flight

Plan

1. It is vitally important that the route of flight

be accurately and completely described in the flight

plan. To simplify definition of the proposed route,

and to facilitate ATC, pilots are requested to file via

airways or jet routes established for use at the altitude

or flight level planned.

2. If flight is to be conducted via designated

airways or jet routes, describe the route by indicating

the type and number designators of the airway(s) or

jet route(s) requested. If more than one airway or jet

route is to be used, clearly indicate points of

transition. If the transition is made at an unnamed

intersection, show the next succeeding NAVAID or

named intersection on the intended route and the

complete route from that point. Reporting points may

be identified by using authorized name/code as

depicted on appropriate aeronautical charts. The

following two examples illustrate the need to specify

the transition point when two routes share more than

one transition fix.

EXAMPLE−
1. ALB J37 BUMPY J14 BHM
Spelled out: from Albany, New York, via Jet Route 37
transitioning to Jet Route 14 at BUMPY intersection,
thence via Jet Route 14 to Birmingham, Alabama.

2. ALB J37 ENO J14 BHM
Spelled out: from Albany, New York, via Jet Route 37
transitioning to Jet Route 14 at Smyrna VORTAC (ENO)
thence via Jet Route 14 to Birmingham, Alabama.

3. The route of flight may also be described by

naming the reporting points or NAVAIDs over which

the flight will pass, provided the points named are

established for use at the altitude or flight level

planned.

EXAMPLE−

BWI V44 SWANN V433 DQO

Spelled out: from Baltimore-Washington International, via

Victor 44 to Swann intersection, transitioning to Victor 433

at Swann, thence via Victor 433 to Dupont.

4. When the route of flight is defined by named

reporting points, whether alone or in combination

with airways or jet routes, and the navigational aids

(VOR, VORTAC, TACAN, NDB) to be used for the

flight are a combination of different types of aids,

enough information should be included to clearly

indicate the route requested.

EXAMPLE−

LAX J5 LKV J3 GEG YXC FL 330 J500 VLR J515 YWG

Spelled out: from Los Angeles International via Jet Route 5

Lakeview, Jet Route 3 Spokane, direct Cranbrook, British

Columbia VOR/DME, Flight Level 330 Jet Route 500 to

Langruth, Manitoba VORTAC, Jet Route 515 to Winnepeg,

Manitoba.

5. When filing IFR, it is to the pilot’s advantage

to file a preferred route.

REFERENCE−

Preferred IFR Routes are described and tabulated in the Chart

Supplement U.S.

6. ATC may issue a SID or a STAR, as

appropriate.

REFERENCE−

AIM, Paragraph 5−2−9 , Instrument Departure Procedures (DP) −

Obstacle Departure Procedures (ODP) and Standard Instrument

Departures (SID)

AIM, Paragraph 5−4−1 , Standard Terminal Arrival (STAR) Procedures

NOTE−

Pilots not desiring a SID or STAR should so indicate in the

remarks section of the flight plan as “no SID” or “no

STAR.”

c. Direct Flights

1. All or any portions of the route which will not

be flown on the radials or courses of established

airways or routes, such as direct route flights, must be

defined by indicating the radio fixes over which the

flight will pass. Fixes selected to define the route

must be those over which the position of the aircraft

can be accurately determined. Such fixes automati-

cally become compulsory reporting points for the

flight, unless advised otherwise by ATC. Only those

navigational aids established for use in a particular

structure; i.e., in the low or high structures, may be

used to define the en route phase of a direct flight

within that altitude structure.

2. The azimuth feature of VOR aids and that

azimuth and distance (DME) features of VORTAC

and TACAN aids are assigned certain frequency

protected areas of airspace which are intended for

application to established airway and route use, and

to provide guidance for planning flights outside of

established airways or routes. These areas of airspace

are expressed in terms of cylindrical service volumes

of specified dimensions called “class limits” or

“categories.”

REFERENCE−

AIM, Paragraph 1−1−8 , Navigational Aid (NAVAID) Service Volumes