"what are the advantages of ham radio during disaster? "

6 ANSWERS

1. Guest8412
   

   nothing

   Report (0) (4)  |   12 years, 9 month(s) ago  

2. Guest3387
   

   Why It Is Essential?
   1)Homeland Security - Ham radio is essential to homeland security in the United States. Our service is a dispersed and decentralized communications system that can't be shut down by terrorist attck. While public safety agencies rely on central dispatch stations, amateur radio operators can go on the air just about anywhere anytime. Hams are trained communicators with technical knowledge that prepares them to put their stations on the air at remote sites quickly, creating makeshift facilities when needed. Amateur radio operators don't have to wait for technicians to arrive to repair equipment or re-program computers. Hams can do it themselves on the fly.
   2)Natural and Human Disasters - Amateur radio operators have proven themselves to be essential volunteer responders in weather and other natural emergencies, and disasters of human origin. Hams can go on the air and stay on the air when ordinary public service communications fail. For many decades, ham radio often has been the only means of communicating from a stricken area to the outside world for hours and sometimes even days.
   3)Communications Technology - Radio amateurs have unique capabilities. The telephone companies can't afford to build cellphone towers everywhere. There are big holes in coverage of sparsely populated areas away from cities and Interstate highways. Ham radio, on the other hand, is everywhere. During disasters, amateur radio volunteers can work without any fixed infrastructure. We're mobile and we're portable.
   Of course, we do have a huge infrastructure in place, also. For example, the ARRL Repeater Directory 2006-2007 lists 20,389 VHF and UHF repeaters across the U.S. and Canada. And then there are hundreds of thousands of homes and cars outfitted with two-way radio transceivers on HF, VHF and UHF bands.
   Whether or not there are towers to receive and repeat their signals, we can't help but notice there are cellphones everywhere. Unfortunately, the one-on-one nature of cellphone calls makes it almost impossible for a large group of emergency workers all at the same time to get an overall picture of how an event is developing. When an emergency manager is taking a call from one person, he or she miss calls from others.
   Also, cell networks can go down when conditions are most critical. Towers can become disabled by the very conditions that may have caused an emergency and cellular networks can be flooded out with panic calls placed by members of the general public.
   Hams operate nets all over the HF, VHF and UHF bands, while public safety agencies and related industries have narrow two-way systems on one or a few frequencies with what they call dispatchers. Those public safety agencies – such as police and fire departments, ambulance companies, rescue squads and the power and telephone companies and other outfits that are part of the nation's critical infrastructure – can't afford to provide the kinds of widespread, distributed radio communications networks for themselves that hams already have. Instead, those agencies that radio amateurs work with during emergencies have to rely on ham radio.
   Radio amateurs bring more than two-way voice communications to emergencies. Here are some of the additional services hams can offer:
   portable and mobile amateur television (atv)
   fixed and mobile data services (packet radio)
   vehicle location services (APRS)
   telephone connections (phone patch) where cellular networks don't have coverage.
   Hams are ready now to carry emergency message traffic across town, across the state, coast-to-coast or around the globe.
   4)Human Resources - Those public service agencies served by radio amateurs get more than the latest technology. They get the hams themselves – dedicated workers who are trained specifically in emergency communications. Training and experience in unexpected emergencies make radio amateurs more likely to convey accurate information over their radio systems. In fact, the served agencies get a close-knit collection of experienced, disciplined volunteers who know how to work together as team.
   For many hams, solving communications challenges is what amateur radio is all about. Because they are dedicated communicators, hams aren't as likely to miss key information shared on a net while agency leaders are busy doing other things. Radio amateurs often can see the big picture and provide information support to agency leaders during a crisis simply because the hams have been monitoring emergency nets and know more about what's going on at any one moment than the agency leadership.

   Report (2) (1)  |   12 years, 9 month(s) ago  

3. Guest2533
   

   In times of crisis and natural disasters, amateur radio is often used as a means of emergency communication when wireline, cell phones and other conventional means of communications fail.
   Unlike commercial systems, Amateur radio is not as dependent on terrestrial facilities that can fail. It is dispersed throughout a community without "choke points" such as cellular telephone sites that can be overloaded.
   Amateur radio operators are experienced in improvising antennas and power sources and most equipment today can be powered by an automobile battery. Annual "Field Days" are held in many countries to practice these emergency improvisational skills. Amateur radio operators can use hundreds of frequencies and can quickly establish networks tying disparate agencies together to enhance interoperability.
   Recent examples include the 2001 attacks on the World Trade Center in Manhattan, the 2003 North America blackout and Hurricane Katrina in September 2005, where amateur radio was used to coordinate disaster relief activities when other systems failed.
   On September 2, 2004, ham radio was used to inform weather forecasters with information on Hurricane Frances live from the Bahamas. On December 26, 2004, an earthquake and resulting tsunami across the Indian Ocean wiped out all communications with the Andaman Islands, except for a DX-pedition that provided a means to coordinate relief efforts. Recently, Amateur Radio operators in the People's Republic of China provided emergency communications after the 2008 Sichuan earthquake and U.S. hams did similar work following Hurricane Ike.
   The largest disaster response by U.S. amateur radio operators was during Hurricane Katrina which first made landfall as a Category 1 hurricane went through Miami, Florida on August 25, 2005, eventually strengthening to Category 5. More than a thousand ham operators from all over the U.S. converged on the Gulf Coast in an effort to provide emergency communications assistance. Subsequent Congressional hearings highlighted the Amateur Radio response as one of the few examples of what went right in the disaster relief effort.

   Report (1) (0)  |   12 years, 9 month(s) ago  

4. Guest4784
   

   fAmateur Activities and practices
   Radio operators use various modes of transmission to communicate. Voice transmissions are most common, with some, such asrequency modulation (FM) offering high quality audio, and others, such as single sideband (SSB) offering more reliable communications, often over long distance, when signals are marginal and bandwidth is restricted, at the sacrifice of audio quality.
   Radiotelegraphy using Morse code (also known as "CW" from "continuous wave") is an activity dating to the earliest days of radio. It is the wireless extension of land line (wire based) telegraphy developed by Samuel Morse and was the predominant real time long-distance communication method of the 19th century. Though computer-based (digital) modes and methods have largely replaced CW for commercial and military applications, many amateur radio operators still enjoy using the CW mode, particularly on the shortwave bands and for experimental work such as earth-moon-earth communication, with its inherent signal-to-noise ratio advantages. Morse, using internationally agreed message encodings such as the Q code, enables communication between amateurs who speak different languages. It is also popular with homebrewers as CW-only transmitters are simpler to construct. A similar "legacy" mode popular with home constructors is amplitude modulation (AM), pursued by many vintage amateur radio enthusiasts and aficionados of vacuum tube technology.
   For many years, demonstrating a proficiency in Morse code was a requirement to obtain amateur licenses for the high frequency bands (frequencies below 30 MHz), but following changes in international regulations in 2003, countries are no longer required to demand proficiency.[8] As an example, the United States Federal Communications Commission phased out this requirement for all license classes on February 23, 2007.[9][10]
   Modern personal computers have encouraged the use of digital modes such as radioteletype (RTTY), which previously required cumbersome mechanical equipment.[11] Hams led the development of packet radio, which has employed protocols such as TCP/IP since the 1970s. Specialized digital modes such as PSK31 allow real-time, low-power communications on the shortwave bands. Echolink using Voice over IPtechnology has enabled amateurs to communicate through local Internet-connected repeaters and radio nodes[12], while IRLP has allowed the linking of repeaters to provide greater coverage area. Automatic link establishment (ALE) has enabled continuous amateur radio networks to operate on the high frequency bands with global coverage. Other modes, such as FSK441 using software such as WSJT, are used for weak signal modes including meteor scatter and moonbounce communications.
   Fast scan amateur television has gained popularity as hobbyists adapt inexpensive consumer video electronics like camcorders and video cards in home computers. Because of the wide bandwidth and stable signals required, amateur television is typically found in the 70 cm (420 MHz–450 MHz) frequency range, though there is also limited use on 33 cm (902 MHz–928 MHz), 23 cm (1240 MHz–1300 MHz) and higher. These requirements also effectively limit the signal range to between 20 and 60 miles (30 km–100 km), however, the use of linkedrepeater systems can allow transmissions across hundreds of miles.[13]
   These repeaters, or automated relay stations, are used on VHF and higher frequencies to increase signal range. Repeaters are usually located on top of a mountain, hill or tall building, and allow operators to communicate over hundreds of square miles using a low power hand-held transceiver. Repeaters can also be linked together by use of other amateur radio bands, landline or the Internet.
   Communication satellites called OSCARs (Orbiting Satellite Carrying Amateur Radio) can be accessed, some using a hand-held transceiver (HT) with a factory "rubber duck" antenna. Hams also use the moon, the aurora borealis, and the ionized trails of meteors as reflectors of radio waves.[14] Hams are also often able to make contact with the International Space Station (ISS),[15] as many astronauts andcosmonauts are licensed as Amateur Radio Operators.[16]
   Amateur radio operators use their amateur radio station to make contacts with individual hams as well as participating in round table discussion groups or "rag chew sessions" on the air. Some join in regularly scheduled on-air meetings with other amateur radio operators, called "Nets" (as in "networks") which are moderated by a station referred to as "Net Control".[17] Nets can allow operators to learn procedures for emergencies, be an informal round table or be topical, covering specific interests shared by a group.
   Band plans and frequency allocations
   
   Main article: Amateur radio frequency allocations
   The International Telecommunication Union (ITU) governs the allocation of communications frequencies worldwide, with participation by each nation's communications regulation authority. National communications regulators have some liberty to restrict access to these frequencies or to award additional allocations as long as radio services in other countries do not suffer interference. In some countries, specific emission types are restricted to certain parts of the radio spectrum, and in most other countries, International Amateur Radio Union (IARU) member societies adopt voluntary plans to ensure the most effective use of spectrum
   In times of crisis and natural disasters, amateur radio is often used as a means of emergency communication when wireline, cell phones and other conventional means of communications fail.
   Unlike commercial systems, Amateur radio is not as dependent on terrestrial facilities that can fail. It is dispersed throughout a community without "choke points" such as cellular telephone sites that can be overloaded.
   Amateur radio operators are experienced in improvising antennas and power sources and most equipment today can be powered by an automobile battery. Annual "Field Days" are held in many countries to practice these emergency improvisational skills. Amateur radio operators can use hundreds of frequencies and can quickly establish networks tying disparate agencies together to enhance interoperability.
   Recent examples include the 2001 attacks on the World Trade Center in Manhattan, the 2003 North America blackout and Hurricane Katrina in September 2005, where amateur radio was used to coordinate disaster relief activities when other systems failed.
   On September 2, 2004, ham radio was used to inform weather forecasters with information on Hurricane Frances live from the Bahamas. On December 26, 2004, an earthquake and resulting tsunami across the Indian Ocean wiped out all communications with the Andaman Islands, except for a DX-pedition that provided a means to coordinate relief efforts. Recently, Amateur Radio operators in the People's Republic of China provided emergency communications after the 2008 Sichuan earthquake and U.S. hams did similar work following Hurricane Ike.
   The largest disaster response by U.S. amateur radio operators was during Hurricane Katrina which first made landfall as a Category 1 hurricane went through Miami, Florida on August 25, 2005, eventually strengthening to Category 5. More than a thousand ham operators from all over the U.S. converged on the Gulf Coast in an effort to provide emergency communications assistance. Subsequent Congressional hearings highlighted the Amateur Radio response as one of the few examples of what went right in the disaster relief effort. 1)Homeland Security - Ham radio is essential to homeland security in the United States. Our service is a dispersed and decentralized communications system that can't be shut down by terrorist attck. While public safety agencies rely on central dispatch stations, amateur radio operators can go on the air just about anywhere anytime. Hams are trained communicators with technical knowledge that prepares them to put their stations on the air at remote sites quickly, creating makeshift facilities when needed. Amateur radio operators don't have to wait for technicians to arrive to repair equipment or re-program computers. Hams can do it themselves on the fly.
   2)Natural and Human Disasters - Amateur radio operators have proven themselves to be essential volunteer responders in weather and other natural emergencies, and disasters of human origin. Hams can go on the air and stay on the air when ordinary public service communications fail. For many decades, ham radio often has been the only means of communicating from a stricken area to the outside world for hours and sometimes even days.
   3)Communications Technology - Radio amateurs have unique capabilities. The telephone companies can't afford to build cellphone towers everywhere. There are big holes in coverage of sparsely populated areas away from cities and Interstate highways. Ham radio, on the other hand, is everywhere. During disasters, amateur radio volunteers can work without any fixed infrastructure. We're mobile and we're portable.
   Of course, we do have a huge infrastructure in place, also. For example, the ARRL Repeater Directory 2006-2007 lists 20,389 VHF and UHF repeaters across the U.S. and Canada. And then there are hundreds of thousands of homes and cars outfitted with two-way radio transceivers on HF, VHF and UHF bands.
   Whether or not there are towers to receive and repeat their signals, we can't help but notice there are cellphones everywhere. Unfortunately, the one-on-one nature of cellphone calls makes it almost impossible for a large group of emergency workers all at the same time to get an overall picture of how an event is developing. When an emergency manager is taking a call from one person, he or she miss calls from others.
   Also, cell networks can go down when conditions are most critical. Towers can become disabled by the very conditions that may have caused an emergency and cellular networks can be flooded out with panic calls placed by members of the general public.
   Hams operate nets all over the HF, VHF and UHF bands, while public safety agencies and related industries have narrow two-way systems on one or a few frequencies with what they call dispatchers. Those public safety agencies – such as police and fire departments, ambulance companies, rescue squads and the power and telephone companies and other outfits that are part of the nation's critical infrastructure – can't afford to provide the kinds of widespread, distributed radio communications networks for themselves that hams already have. Instead, those agencies that radio amateurs work with during emergencies have to rely on ham radio.
   Radio amateurs bring more than two-way voice communications to emergencies. Here are some of the additional services hams can offer:
   portable and mobile amateur television (atv)
   fixed and mobile data services (packet radio)
   vehicle location services (APRS)
   telephone connections (phone patch) where cellular networks don't have coverage.
   Hams are ready now to carry emergency message traffic across town, across the state, coast-to-coast or around the globe.
   4)Human Resources - Those public service agencies served by radio amateurs get more than the latest technology. They get the hams themselves – dedicated workers who are trained specifically in emergency communications. Training and experience in unexpected emergencies make radio amateurs more likely to convey accurate information over their radio systems. In fact, the served agencies get a close-knit collection of experienced, disciplined volunteers who know how to work together as team.
   For many hams, solving communications challenges is what amateur radio is all about. Because they are dedicated communicators, hams aren't as likely to miss key information shared on a net while agency leaders are busy doing other things. Radio amateurs often can see the big picture and provide information support to agency leaders during a crisis simply because the hams have been monitoring emergency nets and know more about what's going on at any one moment than the agency leadership.

   Report (0) (3)  |   12 years, 9 month(s) ago  

5. Guest3978
   

   f**k........off

   Report (3) (1)  |   12 years, 9 month(s) ago  

6. Guest4413
   

   @Guest10948607: 

   
   

   You don't know s**t

   Report (0) (1)  |   12 years, 9 month(s) ago