Marine radio frequencies - Feb 20, 2016 · Radio communication is an integral part of nautical life. Whether you are a casual boater or a seagoing professional, this article provides the marine channels you need for programming modern VHF-UHF radios with the international frequencies for ships, yachts, motorboats, ferries, sailboats, cruise ships, freighters, tankers, industrial docks, skiffs, riverboats, inflatables, aquatic sports ...

 
Coast radio Hobart H24 Distress & Calling uses the National Coast Radio network frequencies and the following frequency: 2524 Day Calling Only. Daily Skeds (initial announcements made on voice emergency frequencies): TIMES : 0745, 1345, 1903 HRS. 2524, 4146 & 6227 kHz. TIMES: 1633. 2524, 4535, 4620 KHz.. Best rated mortgage companies

A VHF marine radio is the single most important radio system you should buy. It is probably also the most inexpensive. If you plan to travel more than a few miles offshore, plan to purchase an MF/HF radiotelephone or mobile satellite telephone, an emergency position indicating radio beacon, or EPIRB, and a second VHF radio or cellular telephone ... This is especially true for high frequency (HF) radios. To help avoid confusion, three terms are used to describe these radio frequencies: assigned, carrier, and window. Assigned Frequency The assigned frequency is defined by the International Telecommunications Union Radio Regulations as "the centre of a frequency band assigned to a station".Nov 2, 2021 · The VHF Marine Band is a global frequency allocation from 156.000-Mhz to about 162.0375-MHz. In the initial division of the band into channels, each channel was allowed a bandwidth of 0.050-MHz or 50-kHz. A channel is designated by its center frequency, and is considered to occupy 0.025-MHz or 25-kHz above and below its center frequency. Radio Listening Watch ... If you're not required to carry a marine radio but choose to voluntarily, tune in to channel 16 (156.800 MHz) whenever the radio is ...This is especially true for high frequency (HF) radios. To help avoid confusion, three terms are used to describe these radio frequencies: assigned, carrier, and window. Assigned Frequency The assigned frequency is defined by the International Telecommunications Union Radio Regulations as "the centre of a frequency band assigned to a station".updated 12.13.2023 United States VHF Marine Channels. International VHF Marine Channels VHF Narrowband 12.5 Khz Channels. Data show on this page is formatted by Output Frequency, Input Frequency, CTCSS or DCS Tone and Date Last Confirmed (Either by me, or reported thru others). R = Repeater S = Simplex I = Input. 86, 87, 88 (fn2) PORT OPERATIONS - These channels are used in directing the movement of ships in or near ports, locks or waterways. Messages must be about the operational handling movement and safety of ships. In certain major ports, Channels 11,12 and are not available for general port operations messages. VHF (Very High Frequency) radio communication uses specific channels for various purposes, and the alloca-tion of these channels may vary by region or country. However, there are standard VHF marine channels that are commonly used worldwide for specific types of communication. Here are some of the standard VHF channels and their purposes: Tas Maritime Radio VMT 232. Phone: 03 6231 2276. TMR now has a VHF Base with a full suite of channels on Maatsuyker Island and monitors CH16. Monitors: VHF Ch 16 statewide 24 hrs / day and HF frequencies and 82 Maatsuyker Island, 2524, 4125, 6215 and 8291 kHz continuously from 0700 -1900 Hrs daily.Columbia-Shuswap. Metro Vancouver. Skeena-Queen Charlotte. Province Entity. Entity Type. BC Ambulance Service (BCAS/EHS) Public Safety. BC Ferries. Business Group.An international distress frequency is a radio frequency that is designated for emergency communication by international agreement. History For ... Marine VHF radio Channel 16 (156.8 MHz) for short range maritime use; 406 MHz to 406.1 MHz is used by the Cospas-Sarsat international satellite-based search and rescue ...Scanner Frequencies and Radio Frequency Reference for Nueces County, Texas (TX) Scanner Frequencies and Radio Frequency Reference for Nueces County, Texas (TX) Database Home; MyRR; Submissions; ... (Marine Ch. 23A) FM: Federal: 157.175: BM: CSQ: USCG 83A: Sector Corpus Christi (Marine Ch. 83A) - Working: FM: … Canadian VHF Frequency and Usage Table. Currently in Canada there are approximately 65 VHF channels available including (5) channels dedicated to Environment Canada’s "Continuous Marine Broadcast" (CMB) Services. Additionally there are (7) Environment Canada WX channels WX1 thru WX7. Like most other places in the world, Canada has dedicated ... Amateur radio Maritime Mobile Service Network on 14,300 kHz. ITU and FCC regulations allow a mariner in distress to use any means possible to attract attention to obtain help, including amateur radio frequencies. U.S. Coast Guard Rescue Coordination Centers emergency telephone numbers. 24 hour Regional Contacts for Emergencies. A VHF marine radio is the single most important radio system you should buy. It is probably also the most inexpensive. If you plan to travel more than a few miles offshore, plan to purchase an MF/HF radiotelephone or mobile satellite telephone, an emergency position indicating radio beacon, or EPIRB, and a second VHF radio or cellular telephone ... VHF (Very High Frequency) radio communication uses specific channels for various purposes, and the alloca-tion of these channels may vary by region or country. However, there are standard VHF marine channels that are commonly used worldwide for specific types of communication. Here are some of the standard VHF channels and their purposes: Channels 68, 69, 71, 72, and 78A are considered non-commercial channels, and in most areas, 68 and 72 are commonly used by the recreational-boating community.Marine Deals is NZ's largest online Superstore offering a wide range of fishing, boating and diving gear. Fast Shipping | No Worries Returns | Lowest ...A marine VHF set is a combined transmitter and receiver and only operates on standard, international frequencies known as channels. Channel 16 (156.8 MHz) is ...UK Marine Band Frequencies; Useful Ham Radio Links; Yaesu Radio’s. Yaesu FT-101 Series Information Page; ... Citizen Band (CB) Radio Frequencies. Related Posts. Palstar PM5K – DEAD! 11 February 2024. Finally, A Drake MN-2000 ATU 10 February 2024. ICE 419B Bandpass Filters 8 February 2024.Frequency License Type Tone Alpha Tag Description Mode Tag; 143.475: M: USCG Aux Sim: Nationwide Simplex "Yankee 3" FMN: Federal: 150.700: RM: USCG Aux Rpt: Repeater: FMNRFID, short for Radio Frequency Identification, is a technology that has revolutionized various industries around the world. From supply chain management to access control systems,...HF (High Frequency) marine radio frequencies operate in the range of 2 to 30 MHz. These frequencies are primarily used for long-distance communication, particularly in international waters. HF radios utilize the ionosphere to bounce signals over long distances, making them suitable for maritime communication beyond the range of VHF …This subcategory contains legacy VHF channels used by local fire, police, and ems agencies prior to the deployment of the county trunked system. Use in late 2014 and beyond is still being confirmed. As usage is confirmed, frequencies will be migrated to the corresponding local govt subcategory. Berks County. Project 25 Phase II.What is a "Marine VHF Radio"? Although not required in recreational boats under 65.5 feet long, a Very High Frequency (VHF) Marine Radio allows instant communication between your boat and other boats, marinas, bridges, and the United States Coast Guard (USCG). It is the primary means of communication on coastal waters and has many ...Lawrence River. Remember, VHF radio channel 16 is used for emergency and calling purposes only. Once you contact another vessel on channel 16, switch to another ...Same as the others above without 70, AIS1, AIS2 and "Public Correspondence (Marine Operator). VDSMS" channels omitted. The exception to that is CH 20 (1020) which is listed with two frequencies. The lower of the two I hear lots of simplex on it so I assume that the marine radios they are using have this frequency as a simplex … DSC test calls on 4207.5 kHz will be automatically acknowledged from any of the US Coast Guard Communication Stations listed below EXCEPT USCG SECTOR Guam. 6312. 8414.5. 12577. 16804.5. Note: For digital selective calling, frequencies listed are assigned. Carrier frequency is located 1700Hz below the assigned frequency. VHF (Very High Frequency) radio communication uses specific channels for various purposes, and the alloca-tion of these channels may vary by region or country. However, there are standard VHF marine channels that are commonly used worldwide for specific types of communication. Here are some of the standard VHF channels and their …Frequency License Type Tone Alpha Tag Description Mode Tag; 143.475: M: USCG Aux Sim: Nationwide Simplex "Yankee 3" FMN: Federal: 150.700: RM: USCG Aux Rpt: Repeater: FMNregulates radio frequency usage, and the operations and use of radiocommunications equipment on a world-wide basis. 1.2 Operators of ship stations other than those ... • Marine Radio Operators Certificate of Proficiency with Marine Satellite Communications Endorsement ORA 27MHz radio is a basic entry level marine radio with an effective range of 10-15 nautical miles, usually limited to “line of sight”. This frequency is highly ...time Radio 16 DISTRESS SAFETY CALLING S e m i-d u p l e x e r e p e at e r s t a t i o n s (i n cluding C h a t h a m I s l a n d M r i t i m R a ... 1 – 5 7 18 6 0 – 6 6 Remove and stick in a prominent position next to your radio. VHF MARINE CHANNELS *Note: Nowcasting is also available on 2019, 2020 and 2079 for four digit radios. Created ...A marine radio can also be used for non-emergency purposes, such as checking the weather forecast or contacting a tow company. Having a marine radio on board can help make your time on the water more enjoyable and safe. Marine radios use the VHF (Very High Frequency) band, which ranges from 156.000 MHz to 162.025 MHz.Third, the USCG uses a set of HF frequencies for tactical radio communications between aircraft, base stations, and USCG Cutters: 5320.0 8337.6 10993.6 11197.4 (Mobile AL) And finally, the USCG has a network which operates on the following frequencies: 3053 4730 6709 8057 8859 8980 9034 11196 13221 15082 17988 20135.5 …If you have radio telex, your ship's transmit frequencies are: 2 502, 4 173.5, 4 176, 6 271, 8 388.5, 12 498.5, 16 692.5, 22 316. INTERNATIONAL SSB (DUPLEX) CHANNELS’ FREQUENCIES Frequencies quoted are in kHz NB: 'Calling, Answering and DISTRESS' channels’ numbers are on page 1. Frequencies in kHz: 4 MHz BAND 6 MHz BANDOne of its roles is to allocate all radio bandwidths and frequencies. In the United States, VHF civil aircraft communications are placed in the 100 MHz band and allocated 760 channels within the range from 118.0-136.975 MHz. As a pilot, every frequency you talk on will fall within this range. VOR navigational frequencies are …Marine VHF Channels From The RadioReference Wiki Contents 1Frequencies 2Related Wiki Articles 3Related Links 3.1USCG 3.2FCC 3.3ISED Canada … Assignment of channel numbers to interleaved channels and simplex operation of duplex channels in the VHF maritime band at 12.5 kHz offsets. Frequencies are in MHz. Limited operation on narrowband channels is permitted in ITU-R Radio Regulations Appendix 18, and is allowed in the US on public correspondence channels under 47 CFR 80.371(c)(iii ... available for marine use; (See Table of Transmitting Frequencies in the VHF Maritime Mobile Band,) ... MARINE VHF RAdIO OPERATORS HANdBOOK. 10. ProtectIon oF ...All NOAA Weather Radio stations broadcast on one of seven frequencies in the VHF Public Service band: 162.400 megahertz (MHz), 162.425 MHz, 162.450 MHz, 162.475 MHz, 162.500 MHz, 162.525 MHz, and 162.550 MHz. While some older Weather Radio receivers will only have three frequencies (162.400, 162.475 and 162.550), any receiver sold …You need a commercial operator license to repair and maintain the following: All ship radio and radar stations. All coast stations. All hand-carried units used to communicate with ships and coast stations on marine frequencies. All aircraft stations and aeronautical ground stations (including hand-carried portable units) used to communicate ...An international distress frequency is a radio frequency that is designated for emergency communication by international agreement. History For ... Marine VHF radio Channel 16 (156.8 MHz) for short range maritime use; 406 MHz to 406.1 MHz is used by the Cospas-Sarsat international satellite-based search and rescue ...VHF Marine Radio Channels and Frequencies USA. Channel Ship Ship Use. Number Transmit Receive. 01A 156.050 156.050 Port Operations and Commercial. VTS in selected areas. 05A 156.250 156.250 Port Operations. VTS in Seattle. 06 156.300 156.300 Intership Safety. 07A 156.350 156.350 Commercial.May 17, 2022 · Channels set aside by the United Kingdom administration, for matters relating to mooring, berthing and race control. There are three marina channels: Channel "M" (157.850 MHz. Channel "M2" (161.425 MHz) Channel "80" (157.025/161.625) Channels M and M2 are UK channels and should only be used in UK territorial waters. What are Marine Radios? One of the most important pieces of safety equipment on board your ship is your two-way radio. VHF Marine radios use the radio frequency range between 156.0 to 162.025 MHz, inclusive. Marine radios have a specific set of frequencies assigned to predetermined channels on the radio, and each channel is designated for a ... Radio communication is an integral part of nautical life. Whether you are a casual boater or a seagoing professional, this article provides the marine channels you need for programming modern VHF-UHF radios with the international frequencies for ships, yachts, motorboats, ferries, sailboats, cruise ships, freighters, tankers, industrial … How marine radio works. VHF radio is a line-of-sight system, which means several things can affect its range: the power of the transmitter; the height of the transmit and receive antennas; solid land objects that interfere with the line of sight between transmitter and receiver; In the U.S., the FCC allocates marine VHF radio channel frequencies. HF (High Frequency) marine radio frequencies operate in the range of 2 to 30 MHz. These frequencies are primarily used for long-distance communication, particularly in international waters. HF radios utilize the ionosphere to bounce signals over long distances, making them suitable for maritime communication beyond the range of VHF …Australian 27MHz Citizens Band Radio. Australian 27 MHz Marine Frequencies. Australian VHF Marine Frequencies. VHF Marine Usage . Minimise/Maximise this section - Citizen Band Radio Frequencies. Citizen Band Radio Frequencies (NO licence required) Channel Number (HF) 27 MHz . Citizens Band. 1: 26.965: 2: 26.975: 3: 26.985: 4: 27.005: 5: … VHF (Very High Frequency) radio communication uses specific channels for various purposes, and the alloca-tion of these channels may vary by region or country. However, there are standard VHF marine channels that are commonly used worldwide for specific types of communication. Here are some of the standard VHF channels and their purposes: SSB is also known as marine high-frequency single-sideband (HF SSB), a name derived from the frequency range it uses, the HF range of 3 to 30 megahertz (MHz). Medium Frequency (MF) is located below the HF bands at .3 to 3 MHz, while Very High Frequency (as in your VHF radio) is above at 30 to 300 MHz. (See adjacent article Im …You need a commercial operator license to repair and maintain the following: All ship radio and radar stations. All coast stations. All hand-carried units used to communicate with ships and coast stations on marine frequencies. All aircraft stations and aeronautical ground stations (including hand-carried portable units) used to communicate ...VHF Marine. VHF Marine Weather is broadcast to some areas in QLD by the Bureau of Meteorology. VHF weather announcement alerts are made on channel 16 (156.800 MHz) with the actual forecast being broadcast on channel 80 (157.025/161.625 MHz) at 0715Z and 2215Z Daily. The BOM forecasts originate from Townsville and are transmitted from …Automatic identification system (AIS) enhances the safety of navigation by providing identification, tracking and other information about the ship to other ships and to coastal destinations automatically. It is regarded as a complementary mean to marine radars to exchange navigational data in VHF frequency band for collision avoidance. Various ...Feb 25, 2013 · Marine Channel TX Frequency Ship Stations TX Frequency Shore Stations Simples / Duplex Description; 0: 156.000 MHz: 156.000 MHz: Private: Used by UK HM Coastguard: 1: 156.050 MHz: 160.650 MHz: Duplex: Public Correspondence Channel (telephone) Ports & Harbours channels: 2: 156.100 MHz: 160.700 MHz: Duplex: Public Correspondence Channel ... Ocean Navigator February 28, 2017. In an increasingly plug-and-play world, marine high-frequency (HF) single sideband (SSB) radio has developed something of a bad reputation, particularly among people relatively new to cruising or long-distance sailing. Naysayers might argue the technology is decidedly low-tech compared to the … The VHF maritime mobile band consists of channels operating in the frequency range 156.000 MHz to 162.050 MHz, apart from those portions within this frequency range that are allocated to the land mobile service. The regulatory framework that regulates channel arrangements and uses in Australia is provided for in the instruments identified below. Use channels 8, 67, 72 and 88 only for ship-to-ship messages. 1(fn5), 7, 8, 9, 10, 11, 18, 19, 63(fn5), 67, 72(fn7), 79, 80, 88(fn1) PUBLIC CORRESPONDENCE (MARINE OPERATOR) - Use these channels to call the marine operator at a public coast station. Frequency License Type Tone Alpha Tag Description Mode Tag; 143.475: M: USCG Aux Sim: Nationwide Simplex "Yankee 3" FMN: Federal: 150.700: RM: USCG Aux Rpt: Repeater: FMNTas Maritime Radio VMT 232. Phone: 03 6231 2276. TMR now has a VHF Base with a full suite of channels on Maatsuyker Island and monitors CH16. Monitors: VHF Ch 16 statewide 24 hrs / day and HF frequencies and 82 Maatsuyker Island, 2524, 4125, 6215 and 8291 kHz continuously from 0700 -1900 Hrs daily.Sorry we couldn't be helpful. Help us improve this article with your feedback.All NOAA Weather Radio stations broadcast on one of seven frequencies in the VHF Public Service band: 162.400 megahertz (MHz), 162.425 MHz, 162.450 MHz, 162.475 MHz, 162.500 MHz, 162.525 MHz, and 162.550 MHz. While some older Weather Radio receivers will only have three frequencies (162.400, 162.475 and 162.550), any receiver sold …Frequency (MHz) Allocated Use: 27.6800: Ch 68 – Commercial calling and working: 27.7200: Ch 72 – Professional fishing calling and working (ship-shore/ship-ship)The Bureau of Meteorology broadcasts its marine weather HF radio services for high seas and Australian coastal areas from transmitters at Charleville in Queensland and Wiluna in Western Australia. Identifiers are VMC (for services from Charleville) and VMW (for services from Wiluna). ... VMW Fax frequencies (kHz): Times are the local time (WST ...All ships should maintain watch on channel 16 (156.800 MHz) when within the service area of a VHF maritime coast station and while at sea. Ships with digital ... Marine VHF radio refers to the radio frequency range between 156 and 174 MHz, inclusive. The "VHF" signifies the very high frequency of the range. In the official language of the International Telecommunication Union the band is called the VHF maritime mobile band. In some countries additional channels are used, such as the L and F channels for ... According to the University of Southern California, radios work by encoding information on radio waves then broadcasting the radio wave with the encoded information onto a particul...KSQ274. RM. 127.3 PL. V MRN CMD. Central/Southern Marin Fire VHF Backup (formerly COMM/OES) FMN. Fire-Talk. 155.100.Nov 9, 2013. #1. We have updated a complete GMRS FRS MURS PMR Weather Marine HAM VHF/UHF Programming File, and it is available for download as a CSV file for fill use in various suitable radios with Chirp or similar programming software. Here is a chart of the channels included in the file. DOWNLOAD. The file, as presented, was mainly developed ...460.3625. WQMJ705. B. 146.2 PL. Hampton Fire. Fire Dispatch/Tac 1 (Simulcast of digital Fire 1 and 2) FMN. Fire Dispatch.Which VHF Radio Channels Can I Use? Channel 16: For hailing, safety and emergency use only Channel 9: Pleasure-boat hailing channel Channels 68, 69, 71, 72 and 78A: Recreational working channels Channels 1, 7A, 8, 10, 11, 18A, 19A, 63, 77, 79A, 80A and 88A: Commercial channels (Pleasure boaters are supposed to stay off them.) …This is especially true for high frequency (HF) radios. To help avoid confusion, three terms are used to describe these radio frequencies: assigned, carrier, and window. Assigned Frequency The assigned frequency is defined by the International Telecommunications Union Radio Regulations as "the centre of a frequency band assigned to a station". Red Channels are private channels they are not availablre for use by non SAR / RNLI vessels. Blue channels are used for Ship to Ship or Ship to Coastguard/Shore communications. They are simplex Channels. Black Channels are Duplex frequency's and CANNOT be used for Ship to Ship Communications. Channel No. Emergency, accident or incident, contact: Taupo Maritime Radio ZLM. VHF Ch 16 (all NZ coastal waters) SSB 2182, 4125, 6215, 8291, 12290 or 16420. Tel: 04 550 5280 from within New Zealand or +64 4 550 5280 from overseas. Email: [email protected]. or.Current FRS/GMRS Channels (effective September 28, 2017) Note that the old GMRS channels (the 462 MHz splinter channels and the 462/467 repeater channels) were not required to narrowband. FRS channel numbers commonly used by 22 channel radios are shown in the leftmost column. Most 22 channel radios of this type which were …Ship radio is used for the safe navigation of vessels and for making distress calls in emergency situations. It enables communication with coast stations, port/harbour authorities and other vessels. Ship radio uses medium frequency (MF), very high frequency (VHF), high frequency (HF), and ultra high frequency (UHF) radio equipment. It can also ... This table is the frequency chart for the VHF Marine Radio Service. There are specifically designated channels for specific usage, as indicated in the chart below. Frequencies are in megahertz. Note that the letter A indicates simplex use of the ship station transmit side of an international duplex channel, and that operations are different ... Find the most widely used marine VHF channels from 1A to 88A for port operations, commercial, intership, and non-commercial traffic in the US. See the …VHF radio distress calls are transmitted on VHF channel 16. This channel is monitored 24-hours per day and dedicated to distress, safety and calling. All VHF ...Find the assigned frequencies of middle and high frequency radiotelephone channels for maritime safety and distress communications. The links provide tables of duplex and …RFID, or Radio Frequency Identification, is a technology that has gained significant popularity in recent years. It is used in various industries and applications, ranging from inv...

VHF (Very High Frequency) radio communication uses specific channels for various purposes, and the alloca-tion of these channels may vary by region or country. However, there are standard VHF marine channels that are commonly used worldwide for specific types of communication. Here are some of the standard VHF channels and their …. 3 beds 2 baths 1 ghost

marine radio frequencies

Areawide Trunking Systems in Nova Scotia. System Name. Type. Maritime Public Safety Radio Network (MPSRN) Project 25 Phase I. Nova Scotia Power. DMR Tier 3 Capacity Max. RCMP (Transportable System) Project 25 Phase I. Red Channels are private channels they are not availablre for use by non SAR / RNLI vessels. Blue channels are used for Ship to Ship or Ship to Coastguard/Shore communications. They are simplex Channels. Black Channels are Duplex frequency's and CANNOT be used for Ship to Ship Communications. Channel No. Learn the basics of medium and high frequency radio (MF/HF-SSB) for maritime users who need to communicate over long distances. Find out how to choose the right …Peoria (City) 460.225 173.8 PL is still used by other agencies not on the P25 system. It can operate in repeater and direct mode (same tone when direct). Used at the fair 2016 for Medical and Security with PPD. The preferred first three frequencies for the purpose indicated in note a) are 156.450 MHz (channel 09), 156.625 MHz (channel 72) and 156.675 MHz (channel 73). j. Channel (70) is to be used exclusively for digital selective calling for distress, safety and calling. k. zz. From 1 January 2019, channels 1027, 1028, 87 and 88 are used as single-frequency analogue channels for port operation and ship movement. See the U.S. VHF Marine … Marine 27 MHZ Radio Channels. Frequency (MHz) Allocated Use: 27.6800: Ch 68 – Commercial calling and working: 27.7200: Ch 72 – Professional fishing calling and ... RFID, short for Radio Frequency Identification, is a technology that has revolutionized various industries around the world. From supply chain management to access control systems,...The extremely high-frequency band is the highest in the RF frequency spectrum, which ranges between 30 GHz and 300 GHz. EHF is only used in advanced communication systems due to its complex nature and line of sight requirement. EHF is used in radio astronomy and remote sensing (weather analysis). Due to large bandwidth …This publication is an extension to the Seldec Maritime Pocket Guide, but with much more information and many more frequencies. As well as an extended VHF frequency section there are now HF Frequencies, details of NAVTEX, and more.The book is arranged in seventeen sections, over 150 pagesSections 1 to 5 list VHF Frequencies and Channels …This subcategory contains legacy VHF channels used by local fire, police, and ems agencies prior to the deployment of the county trunked system. Use in late 2014 and beyond is still being confirmed. As usage is confirmed, frequencies will be migrated to the corresponding local govt subcategory. Berks County. Project 25 Phase II. All frequencies in MHz. For completeness USA channels are shown, 109 to 119 are actually duplex channels, but are used as simplex channels in UK. Channels marked xx have no marine channel designation in UK, and the users may use their in house channel numbers. At times of enhanced radio propagation usually during the summer months when high ... Marine radio uses narrow band frequency modulation (NFM) for voice communications, and can be received by most analog radio scanners. Some channels are simplex (S), same frequency used for transmission and reception. All radios can listen or talk to all other radios on these channels. Only one party can transmit (talk) at a time. .

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