HIRTA 1LT BOWMAN

AGENDA n INTRODUCTION n DEFINITIONS n EME n EME VARIATIONS n EME PROTECTIONS n LOCAL AREA n REPORTING n CONCLUSION

DEFINITIONS n HIRTA: High Intensity Radio Transmission Area n Electromagnetic Interference (EMI): Any electromagnetic transmission that causes interruption of normal operation of a piece of equipment. n Electromagnetic Effects (EME): Any interruption of normal operation of a piece of equipment caused by electromagnetic radiation.

ELECTROMAGNETIC EFFECTS n Personnel: Direct exposure to radiation can cause harmful health effects. n Equipment: uncommanded control movements, unexplained departure from normal controlled flight, unexplained illumination of caution/warning/advisory lights w/wo loss of corresponding system.

EME VARIATIONS n Causes: strength of radiation, distance from the source, frequency being transmitted, and the susceptibility and shielding of the piece of equipment.

EME PROTECTIONS n Wire covering n bonding straps n metal shields n skin of aircraft n paint n DISTANCE

LOCAL AREA n Kaena Point, Oahu: 2800’ radius, 2800’ above all antennas along a 3 mi. stretch of mountain ridge. Assume 24 hrs./day. n Makaha Point, Kauai: 2500’ radius, 2500’ above antenna at NASA Telemetry Station. Assume 24 hrs./day. n GSOP: 1/4 nm laterally and 1500’ vertically. n EH-60 don’t operate w/I 3000’ shipboard operations

REPORTING n If you experience EME, see Safety Officer and fill out AAAR form.

Conclusion n Understand EME/EMI n Know local area n Stay away n Assume radiation is always present n Understand possible effects n Report incidents n QUESTIONS?