scope:

Purpose.

This part of MIL-HDBK-240 provides the recommended methods and techniques to develop the guidance necessary to establish electromagnetic environment (EME) controls to reduce the risk of hazards of electromagnetic radiation to ordnance (HERO). This part also supplements Defense Explosives Safety Regulation (DESR) 6055.09 by providing the guidance necessary to establish EME controls to ensure HERO is addressed during military operations or training exercises.

Background.

There are six specific objectives of this handbook:

a. Document electromagnetic environmental effects (E3) Joint-Service methodology.

b. Promote standardization.

c. Provide operational guidance methodology for managing HERO.

d. Define HERO classifications and associated maximum allowable environments (MAEs) as defined in MIL-HDBK-240-2, Section 7.

e. Determine the safe separation distances (SSDs) for HERO SUSCEPTIBLE and HERO UNSAFE ORDNANCE.

f. Facilitate the exchange of data.

Ordnance containing electrically initiated devices (EIDs) are classified as either HERO SAFE, HERO SUSCEPTIBLE, or HERO UNSAFE. These general HERO classifications provide a means for identifying the level of susceptibility to the EME and are defined in MIL-STD-464.

In general, risk-reduction measures developed using analytical methods may entail silencing all emitters during ordnance operations, ensuring ordnance operations are conducted in radio frequency (RF)-free environments, or imposing SSDs between the offending emitters and HERO SUSCEPTIBLE and HERO UNSAFE ORDNANCE. These methods can be very restrictive and do not always allow for operational flexibility; the use of instrumented HERO surveys (measurements) to characterize the EME provides a better means for managing HERO (see MIL-HDBK-240-6). Ultimately, the information gathered is used to determine the operational guidance for the safe storage and use of ordnance and weapon systems containing EIDs.

When defining the operational EME, one should anticipate not only the individual Service EME, but also the EME in Joint-operation scenarios. The JCIDS Manual states that, "Because all weapons/weapon systems have the potential of being deployed together or employed in joint environments, weapons and weapon systems will be considered joint systems within the Joint Capabilities Integration and Development System (JCIDS) process and may be designated as JROC or JCB Interest." As Joint operations become more commonplace, there is an increased likelihood that weapons from one Service will be exposed to other Services' EME levels. MIL-STD-464 specifies the EME levels for HERO SAFE certification.

intended Use:

This handbook can be used by any facility that has a need to document the HERO procedures for any of the military departments.