How To Use A Walkie-Talkie In A Disaster
A walkie-talkie, or handie talkie, (more formally known as a handheld transceiver) is a hand-held, portable, two-way radio transceiver.
Major characteristics include :
Simplex operation (only one radio transmits at a time, on the same
channel or frequency, though any number can listen) and a "push-to-
talk" (P.T.T) switch that starts the transmission. Communication is
direct from one radio to the other radio or radios and is line of
sight.
Half-duplex operation, only one radio transmits at a time, each radio
on a different channel or frequency, though any number can listen it
is difficult to do so because you only hear one side of the
conversation. Unless you listen to both channels or frequencies. As
before "push-to-talk" (P.T.T) switch that starts the transmission.
Communication is direct from one radio to the other radio or radios
and is line of sight. Also the channels or frequencies do not have to
be in the same band or even the same mode. One radio can be on VHF
while the other can be on a UHF frequency, this is known as cross-band
operation and can provide a basic level of security. Also one radio
can transmit in AM or SSB mode while the other transmitts in FM mode,
further complicating monitoring of both halves of the conversation.
Full-duplex operation, both radios can transmit at the same time, each
radio on a different channel or frequency, though any number can
listen it is difficult to do so because you only hear one side of the
conversation. Unless you listen to both channels or frequencies. As
before "push-to-talk" (P.T.T) switch that starts the transmission.
Communication is direct from one radio to the other radio or radios
and is line of sight.
Repeater operation, both hand-held radios transmit on the same channel
or frequency , known as the offset or repeater input channel or
frequency, only one radio transmits at a time. Both hand-held radios
listen on a different channel or frequency known as the repeater
output channel or frequency. Any number of radios can listen on the
output channel or frequency. As before "push-to-talk" (P.T.T) switch
that starts the transmission. Use of a repeater greatly extends the
distance two radios can communicate, beyond line of sight. Because it
is NOT direct radio to radio, but radio to repeater to radio
communication. Also repeater operation can be cross-band allowing
two different radio systems (one VHF and one UHF) to communicate with
each other where direct radio to radio communication would be
impossible.
Hand-held transceivers may be used to communicate between each other, or to vehicle-mounted or base stations.
As of 2011, ten-codes remain in common use, but have been phased out in some areas in favor of plain language. Nineteen states were planning to change to plain English as of the end of 2009.
Major characteristics include :
Simplex operation (only one radio transmits at a time, on the same
channel or frequency, though any number can listen) and a "push-to-
talk" (P.T.T) switch that starts the transmission. Communication is
direct from one radio to the other radio or radios and is line of
sight.
Half-duplex operation, only one radio transmits at a time, each radio
on a different channel or frequency, though any number can listen it
is difficult to do so because you only hear one side of the
conversation. Unless you listen to both channels or frequencies. As
before "push-to-talk" (P.T.T) switch that starts the transmission.
Communication is direct from one radio to the other radio or radios
and is line of sight. Also the channels or frequencies do not have to
be in the same band or even the same mode. One radio can be on VHF
while the other can be on a UHF frequency, this is known as cross-band
operation and can provide a basic level of security. Also one radio
can transmit in AM or SSB mode while the other transmitts in FM mode,
further complicating monitoring of both halves of the conversation.
Full-duplex operation, both radios can transmit at the same time, each
radio on a different channel or frequency, though any number can
listen it is difficult to do so because you only hear one side of the
conversation. Unless you listen to both channels or frequencies. As
before "push-to-talk" (P.T.T) switch that starts the transmission.
Communication is direct from one radio to the other radio or radios
and is line of sight.
Repeater operation, both hand-held radios transmit on the same channel
or frequency , known as the offset or repeater input channel or
frequency, only one radio transmits at a time. Both hand-held radios
listen on a different channel or frequency known as the repeater
output channel or frequency. Any number of radios can listen on the
output channel or frequency. As before "push-to-talk" (P.T.T) switch
that starts the transmission. Use of a repeater greatly extends the
distance two radios can communicate, beyond line of sight. Because it
is NOT direct radio to radio, but radio to repeater to radio
communication. Also repeater operation can be cross-band allowing
two different radio systems (one VHF and one UHF) to communicate with
each other where direct radio to radio communication would be
impossible.
Hand-held transceivers may be used to communicate between each other, or to vehicle-mounted or base stations.
As of 2011, ten-codes remain in common use, but have been phased out in some areas in favor of plain language. Nineteen states were planning to change to plain English as of the end of 2009.
- 10-0 Caution
- 10-1 Unable to copy -- change location
- 10-2 Signal good
- 10-3 Stop transmitting
- 10-4 Acknowledgement (OK)
- 10-5 Relay
- 10-6 Busy -- stand by unless urgent
- 10-7 Out of service
- 10-8 In service
- 10-9 Repeat
- 10-10 Fight in progress
- 10-11 Dog case
- 10-12 Stand by (stop)
- 10-13 Weather -- road report
- 10-14 Prowler report
- 10-15 Civil disturbance
- 10-16 Domestic disturbance
- 10-17 Meet complainant
- 10-18 Quickly
- 10-19 Return to ...
- 10-20 Location
- 10-21 Call ... by telephone
- 10-22 Disregard
- 10-23 Arrived at scene
- 10-24 Assignment completed
- 10-25 Report in person (meet) ...
- 10-26 Detaining subject, expedite
- 10-27 Drivers license information
- 10-28 Vehicle registration information
- 10-29 Check for wanted
- 10-30 Unnecessary use of radio
- 10-31 Crime in progress
- 10-32 Man with gun
- 10-33 Emergency
- 10-34 Riot
- 10-35 Major crime alert
- 10-36 Correct time
- 10-37 (Investigate) suspicious vehicle
- 10-38 Stopping suspicious vehicle
- 10-39 Urgent -- use light, siren
- 10-40 Silent run -- no light, siren
- 10-41 Beginning tour of duty
- 10-42 Ending tour of duty
- 10-43 Information
- 10-44 Permission to leave ... for ...
- 10-45 Animal carcass at ...
- 10-46 Assist motorist
- 10-47 Emergency road repairs at ...
- 10-48 Traffic standard repair at ...
- 10-49 Traffic light out at ...
- 10-50 Accident (fatal, personal injury, property damage)
- 10-51 Wrecker needed
- 10-52 Ambulance needed
- 10-53 Road blocked at ...
- 10-54 Livestock on highway
- 10-55 Suspected DUI
- 10-56 Intoxicated pedestrian
- 10-57 Hit and run (fatal, personal injury, property damage)
- 10-58 Direct traffic
- 10-59 Convoy or escort
- 10-60 Squad in vicinity
- 10-61 Isolate self for message
- 10-62 Reply to message
- 10-63 Prepare to make written copy
- 10-64 Message for local delivery
- 10-65 Net message assignment
- 10-66 Message cancellation
- 10-67 Clear for net message
- 10-68 Dispatch information
- 10-69 Message received
- 10-70 Fire
- 10-71 Advise nature of fire
- 10-72 Report progress on fire
- 10-73 Smoke report
- 10-74 Negative
- 10-75 In contact with ...
- 10-76 En route ...
- 10-77 ETA (estimated time of arrival)
- 10-78 Need assistance
- 10-79 Notify coroner
- 10-80 Chase in progress
- 10-81 Breathalyzer
- 10-82 Reserve lodging
- 10-83 Work school xing at ...
- 10-84 If meeting ... advise ETA
- 10-85 Delayed due to ...
- 10-86 Officer/operator on duty
- 10-87 Pick up/distribute checks
- 10-88 Present telephone number of ...
- 10-89 Bomb threat
- 10-90 Bank alarm at ...
- 10-91 Pick up prisoner/subject
- 10-92 Improperly parked vehicle
- 10-93 Blockade
- 10-94 Drag racing
- 10-95 Prisoner/subject in custody
- 10-96 Mental subject
- 10-97 Check (test) signal
- 10-98 Prison/jail break
- 10-99 Wanted/stolen indicated
