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Showing posts from December, 2024

The MI9 Code for Captured and Detained Personnel

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The MI9 Code originated in WW-II and a version of this code is still taught in SERE, allowing captured and detained personnel to transmit a hidden message in otherwise ordinary and mundane correspondence. First, you are going to need the letter writer’s secret number which in this example is 1. (This number is per-arranged, and listed in the EPA.) Then, you need to find the keyword in the encrypted letter which will give you the positions of the words that comprise the hidden message. Find the keyword Count the characters of the first two words of the letter and add the number of the letter writer. In the example embedded below, the first words are ‘I’m afraid’, hence 8 characters. We add 1 (the letter writer’s secret number), 8+1=9. The ninth word, in this case ‘keenly’, is our keyword! Find the codeword frequency Convert the keyword into numbers based on the letters’ position in the alphabet and eliminate numbers 1 to 3. In the example, K=11, E=5, E=5, N=14, L=12, Y=25, so KEENLY t...

Communications for Isolated Personnel

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*Personal Survival Kits* . Creating and carrying a personal survival kit will augment any issued survival equipment in order to help an isolated person survive. Individuals must personalize their survival kits for the operating environment. Consider including the following items in a personal survival kit: water, shade tarp, [firearms and] ammunition, radio, personal locator beacon (PLB), satellite phone, commercial tracking device, maps, compass, and emergency signaling devices, local purchase cell phone, sun block, insect repellent, head net, space blanket, burlap, poncho, a mirror, infrared (IR) and visible lights (e.g.: Fire Flies, laser pointer, Micro Lights, Phoenix, chemical lights, etc.), 3’x3’ bright colored cloth, 1 sq. inch of glint tape, knife or multi-tool, fire starter, candle, button compass, water purification tablets, three 1-gallon zip lock bags, large plastic leaf/trash bag (for water storage and protection from the elements), 100 ft. parachute cord, gloves, large ne...

DMR Simplex Direct Messaging

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You can send a direct (text) message between two DMR radios, if know the other person's DMR ID (You can look up ID by callsign here: https://database.radioid.net/database/search). Start by selecting a DMR channel on your radio. Common DMR Simplex channels include: UHF Frequencies: 441.000 MHz 441.500 MHz 446.500 MHz 433.450 MHz VHF Frequencies: 145.790 MHz (used in some areas) 145.510 MHz (used in some areas) Channel Configuration: When programming DMR simplex channels, the following settings are commonly used: Talk Group (TG): 99 (a common convention for simplex use) Color Code (CC): 1 (a common convention for simplex use) Time Slot (TS): 1 or 2 (depending on the radio and desired functionality) Admit Criteria: Always or Channel Free (depending on the desired behavior) Both radios MUST be on the same channel and talk group in order to receive DMR direct messaging. Because the messages are direct (private) they are only received by the radio ID to which they are addressed. (Whi...