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Pilot/Controller Glossary

3/29/18

PCG J−1

J

JAMMING− Electronic or mechanical interference

which may disrupt the display of aircraft on radar or

the transmission/reception of radio communications/

navigation.
JET BLAST− Jet engine exhaust (thrust stream

turbulence).

(See WAKE TURBULENCE.)

JET ROUTE− A route designed to serve aircraft

operations from 18,000 feet MSL up to and including

flight level 450. The routes are referred to as “J”

routes with numbering to identify the designated

route; e.g., J105.

(See Class A AIRSPACE.)
(Refer to 14 CFR Part 71.)

JET STREAM− A migrating stream of high-speed

winds present at high altitudes.

JETTISONING OF EXTERNAL STORES− Air-

borne release of external stores; e.g., tiptanks,

ordnance.

(See FUEL DUMPING.)
(Refer to 14 CFR Part 91.)

JOINT USE RESTRICTED AREA−

(See RESTRICTED AREA.)

JUMP ZONE−  The airspace directly associated with

a Drop Zone. Vertical and horizontal limits may be

locally defined.