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VHF Radio: Channel 16
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CB Radio: Channel 9
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Family Radio Service (FRS): UHF: Channel 1
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Single-sideband and amateur (ham) radio: 2182 kHz, 14.300 MHz, 14.313 MHz
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Air band Radio: 121.5 MHz, 243MHz
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UHF Radio (Australia): Channel 5
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Cellphones: Try dialing 911 on your cellphone, even if you think you’re not within coverage. Then try texting someone who you know checks his texts. Text is better than voice in many cases because it can get through when voice can’t. If you have plenty of battery power, send a text, and then leave the unit on as you travel. The unit searches for reception until it transmits. The higher you are, the greater the possibility that your cellphone will make contact with a tower.
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911: U.S., Canada, Central America (partial), Philippines
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066, 060, 080, 911: Mexico.
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112: Europe, Australia, New Zealand, Colombia, India, South Korea, South Africa, Israel
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999, 120: China (PRC)
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110: Jamaica
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190, 191: Brazil
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1669, 191: Thailand
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113, 115: Vietnam, Chile
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SOS in Morse code: . . . - - - . . . (3 short tones, 3 long tones, 3shorts)
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International distress signal code word: Mayday, spoken three times