Amateur radio operators on Oahu that participate with emergency communications are registered with Oahu Civil Defense Agency (OCDA) as RACES (Radio Amateur Civil Emergency Service) radio volunteers. Click on this link for more information on OCDA RACES.
Enjoy, and feel free to drop me an e-mail if you have any questions.
NVIS, which stands for Near-Vertical Incident Skywave, is a simple yet powerful technique where HF in the frequency range of about 3 to 7 Mhz (the 40, 60 and 80 meter bands) is aimed upwards towards the sky, reflected off the ionosphere, and returns to the ground in a pattern that spreads out in a circle approximately 400 or more miles across.
You might find these articles to be very convincing.
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