hazards. Identify the uses of the emission
control (EMCON) bill.
The functional characteristics of electrically
initiated ordnance cause hazards of electromagnetic
radiation to ordnance (HERO). Ordnance that presents
a HERO problem includes cartridges, cartridge
-actuated devices, and 20-mm ammunition. The
ordnance electroexplosive devices (EEDs) may be
accidentally initiated or their performance degraded by
exposure to radio frequency (RF) environments.
Ordnance is more susceptible to RF environments
during assembly, disassembly, handling, loading, and
The term RADHAZ (radiation hazards) applies to
sufficient intensity to
produce harmful biological effects in humans,
cause spark ignition of volatile combustibles or
actuate electroexplosive devices.
Although the effects of RADHAZ are important, this
chapter limits discussion to HERO hazards.
HERO ORDNANCE CLASSIFICATIONS
A testing program sponsored by the Naval Sea
Systems Command (NAVSEASYSCOM) determines
the susceptibility of ordnance to RF environments.
Tests are conducted in the maximum RF environment
the ammunition or ordnance systems may be subjected
to in its stockpile-to-launch sequence. This data is the
basis for the three HERO classifications assigned to
ordnanceHERO-safe ordnance, HERO-susceptible
ordnance, and HERO-unsafe ordnance.
An ordnance item is classified as HERO safe if it
meets the following criteria:
Sufficiently shield protected so all EEDs
contained by the item are immune to adverse
effects (safe and/or reliable) when the item is
used in its expected RF environments.
General HERO requirements are observed.
susceptible if proved (by tests) to contain EEDs.
HERO-susceptible ordnance can be adversely affected
by RF energy. The safety and/or reliability of the
system is in jeopardy when the system is used in its
expected RF environments.
An ordnance item is classified as HERO unsafe if
it meets the following criteria:
Its internal wiring is physically exposed.
Tests are being conducted on the item that result
in additional electrical connections to the item.
EEDs that have exposed wire leads are handled
The item is being assembled or disassembled.
It is disassembled.
REVIEW NUMBER 4 ANSWERS
The weapons staging area on the flight deck
located between the island and the starboard
catwalks is known as the bomb farm.
ammunition loaded onto an aircraft carrier is
authorized in emergency situations when
conform to the ship's sailing schedule.
Conventional replenishment (CONREP) and
vertical replenishment (VERTREP) are used
to transfer ammunition at sea.
When VERTREP is being used to transfer
ammunition between ships, helicopters using
slings or cargo nets accomplish transfer.
HERO EMISSION CONTROL (EMCON)
Ordnance items classified as HERO unsafe are
protected from electromagnetic radiation by putting
them in a completely enclosed all-metal container.
NOTE: Ordnance in a wooden or plastic
container or on a metal pallet is as exposed as if
the container or pallet were not there.