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- Airborne release of external stores; e.g., tiptanks, ordnance.
(See FUEL DUMPING.)
(Refer to 14 CFR Part 91.)
JOINT USE RESTRICTED AREA-
(See RESTRICTED AREA.)