superyacht radio communications installation services
Wireless Communications Blog

OneWeb For Superyachts

Smooth Sailing with OneWeb: Advantages for Superyachts Superyachts offer luxurious adventures on the high seas, and OneWeb satellite connectivity is making these voyages even more incredible. In this article, we’ll explore how OneWeb is transforming the superyacht sector, ensuring that your experience is nothing short of extraordinary. 1. Staying Connected, Everywhere Superyacht journeys often take …

Wireless Communications Blog

Improving Crew Welfare at Sea

Title: Improving Crew Welfare at Sea: The Benefits of LEO Satellite Connectivity When it comes to life at sea, maintaining the welfare and happiness of the crew is paramount. For this reason, providing Low Earth Orbit (LEO) satellite connectivity to ships has become a game-changer. Let’s explore the advantages of this technology and how it’s …

Wireless Communications Blog

Satellite Orbits

Satellites orbit around celestial bodies, such as planets or stars, under the influence of gravity. The specific characteristics of a satellite’s orbit depend on various factors, including its altitude, velocity, and the mass of the celestial body it is orbiting. Here are some key concepts related to satellite orbits: In summary, satellite orbits are determined …

Connecting the World
Wireless Communications Blog

Connecting the World

Connecting the world is a moral imperative, in our opinion. Recent figures suggest that less than half the world has internet access. Connectivity brings economic and cultural benefits. Connectivity also empowers women and girls, who currently have less access to the internet. Without the internet, they are kept at a disadvantage. Disadvantage in terms of …

DTEx Marine Radio
marine Wireless Communications Blog

DTEx Marine Radios

Entel’s DTEx Commercial Marine Series is a range of marine radios specifically designed for commercial use. They offer crystal-clear audio quality, long-range communication capabilities, and durable design. They are “intrinsically safe”, which means that they are designed to not produce sparks that could ignite flammable gases or dust in hazardous environments, making them suitable for …

Wireless Communications Blog

Optical Satellite Communications

Optical Satellite communications refers to the use of laser technology to transmit data through the atmosphere using satellites. This technology is used to transmit large amounts of data, such as video and internet communications, over long distances. The main advantage of using optical communications is the high data rate that can be achieved, which is …

ATEX Intrinsically Safe radios
Wireless Communications Blog


ATEX stands for “ATmospheres EXplosibles.” It is a set of European Union regulations that govern the design and use of equipment and protective systems intended for use in potentially explosive atmospheres. The regulations cover equipment and protective systems that may be used in areas where there is a risk of a explosion due to flammable …

Hytera PD405 UHF DMR Digital Radio
Radio Blog Wireless Communications Blog

Factory Radio Hytera PD405

Factory Radio Walkie Talkie For industrial operations within a factory, we recommend the Hytera PD405 factory radio, for improving communications efficiency. It is an excellent upgrade for business process improvement. The factory radio has proved reliable with our industrial customers, and in fact we have never had one returned under warranty, due to failure. The …

ptt over cellular mast
Wireless Communications Blog

PTT over Cellular Two-Way Radio

PTT over Cellular, or Push to Talk over cellular, as it is also referred to is a method of two-way radio communication. As the name suggests, PTT over Cellular uses cellular networks, rather than radio-to-radio, or radio-to-radio via a repeater, that traditional two-way radio systems use. For those reading who are not familiar with the …

Wireless Communications Blog

Fuses in Radio Equipment power Supplies

The importance of fuses in radio equipment power supplies A safe two-way radio equipment installation requires the ability to quickly disconnect the supply to the equipment if a fault develops. Fuses in radio equipment are a cost-effective solution, for equipment safety. What are Electrical Fuses Fuses are devices that protect equipment installations, from excess electrical …

industry 4.0
IOT Blog Wireless Communications Blog

Build a Lorawan Gateway

What is  Lorawan First of all, what is Lorawan.  It is a wireless technology that allows small amounts of data to be sent between a remote sensor (such as a river level detector), and the Internet. Lorawan technology is very efficient at sending the sensor data over long distances, whilst consuming very little power. This …

Wireless Communications Blog

History of Two Way Radio

Radio communications systems started to appear in the late 19th Century, with pioneers like Marconi sending signals across the Atlantic by morse code.

Soon such systems were being rapidly adopted by both government and industry, as an alternative to the existing ‘Wired’ telegraph systems.

Radio offered advantages over the Telegraph system, due to cheaper infrastructure costs. This is because the telegraph system required the purchase and installation of telegraph wires & poles.

Radio communications, on the other hand, did not require expensive long distance wires, and the installation of many telegraph poles.

Radio proved to be particularly cost-effective compared to the telegraph, for international communications, which required undersea cable installation.

There were some disadvantages of early radio communications systems, however.

One such disadvantage was call privacy, as early radio systems did not use the modern encryption methods available on radio systems today.

This meant that confidential messages could be easily eavesdropped, by ‘Third Parties’.

This was an issue for both government and business users, but modern systems have overcome this.

A famous early example of radio communications use was the ‘Titanic’ ship disaster of April 1912. The Titanic is a state of the art ship that had been equipped with a two-way radio system, which used Morse Code for communicating messages.

As the ship was sinking, radio messages were able to be sent out for help, and it was the first time that the new emergency code ‘SOS’ was used.

Although there was a massive loss of life, many lives were undoubtedly saved due to being able to get the message out to rescue ships in the area that they were sinking.

Without radio communications, the first indication of the disaster would have been, when the ship failed to arrive in New York as scheduled.

In 1922 the BBC was formed in the UK, and for the first time, the ordinary (nongeek) public was able to experience radio. Although public broadcasting is only one way of communication, it is worth mentioning as a milestone in the history of radio communications.

World War Two necessitated innovative approaches to communications, and the American company Motorola was the first to develop a handheld portable ‘Walkie Talkie’.

As the Transistor and solid-state electronics were not invented till the 1950s, the wartime Walkie Talkie used ‘Thermionic Valves’ (Tubes in the USA). This meant that they were not particularly efficient, and quite large in size.

The Motorola-designed Walkie Talkie was however an important step forward in radio communications development.

Private commercial use of Two Way Radio by businesses in the UK started just after the war in the late 1940s. This allowed businesses to instantly communicate with their drivers out on the road and was very useful for Taxi firms.

Early equipment was not particularly efficient compared with the latest Digital & Analogue radios available now. Reasons for this include, inefficient use of frequency bands (wide bandwidth), and less efficient electronics available to the designers of the equipment.

In equipment prior roughly to the 1980s, the frequency that the radio was required to operate on (set by what is now OFCOM), was controlled by a ‘Crystal Oscillator’.

These had to be custom made for a particular frequency and then installed into the Two-Way Radio. Once installed, they needed to be set up using a Radio Communications Test Set.

Modern equipment does not require crystals to be purchased and installed but does instead require the radio to be connected to a computer system and programmed to the required frequency and options.

Modern Two Way radio systems are sometimes also integrated into the internet, and it is possible to communicate using a handheld Walkie Talkie, from a field in the UK to a factory in Australia.

To do this the signal is received from the handheld radio by a Digital Repeater Base station located near and within range of the handheld radio. The voice signal is then fed onto the internet by the Repeater.

At the Australian end is another internet-connected Repeater, which then transmits the voice signal out to the nearby Australian factory worker’s handheld Walkie Talkie.

When the Australian worker talks back, the process works in reverse.

For more information on the history of two-way radio, check out other articles on our site.

Author: Craig Miles BSc( Hon’s), PGCE


    Digital Two Way Radio






    entel dx482 two way radio

    Two-way Radio for Farms

    For Agriculture Farmers are increasingly choosing to use two-way radio for farms, instead of mobile phones for a number of reasons: 1)   Higher reliability than mobile phones in sparse rural areas  due to poor phone coverage. 2) More rugged design of two-way radio handsets. Models from Hytera  & Tait for example can survive being dropped …

    Hytera RD985 Repeater

    Installing a Radio Repeater

    Installing a radio repeater has two advantages. The first advantage is an increase in communications range. The second advantage is that it overcomes signal dead spots. What I mean by dead spots, are areas of the desired coverage area, that radio signals cant reach. Reasons for dead spots Dead spots are caused by the received …

    yesway communications
    Wireless Communications Blog

    Radio Signal Propagation

    Radio signal propagation refers to the way in which radio signals travel through the environment. There are several factors that affect radio signal propagation, including: Frequency: Different frequencies have different characteristics when it comes to signal propagation. For example, higher frequency signals (such as those in the microwave range) are more easily absorbed by buildings …

    Motorola MXP600 Tetra Superyacht Radio
    Super yacht Wireless Communications Blog

    TETRA Superyacht Radio Communications

    TETRA is increasingly popular for superyacht radio communications. Tetra is a digital trunked radio system widely used by emergency services around the world, and is security focussed. The word TETRA is short for Trans European Trunked Radio. Benefits TETRA provides superyacht crew and owners, with instant voice and data communications. Communications are secure and reliable, …

    ATEX Intrinsically Safe radios
    Super yacht two-way-radio Wireless Communications Blog

    Superyacht ATEX

    Superyacht ATEX equipment, is designed to prevent explosions. Superyachts and other Marine vessels, are at potential risk of explosion. Explosions are caused by electrical sparks being produced by equipment, being used in areas with potentially explosive atmospheres. An example of a potentially explosive environment, is a ships battery room. In a battery room, potentially explosive …

    Wireless Communications Blog

    How Satellite Communications Works

    How satellite Communications work. Satellite communication systems work through a series of steps involving the transmission of signals between ground-based stations and satellites in orbit. Here’s a simplified explanation: The entire process enables communication over long distances, providing a global reach without the need for a physical infrastructure connecting the communicating parties. It’s important to …

    Wireless Communications Blog

    Satellite System Use?

    Satellite System Use. Satellite communication systems are used in various applications where traditional land-based communication infrastructure may be impractical or unavailable. Here are some key areas where satellite communication systems are commonly employed: In essence, satellite communication systems are versatile and serve as a critical infrastructure component in situations where other forms of communication may …

    Wireless Communications Blog

    Satellite Communications Architecture

    Satellite communications involve a complex architecture that allows for the transmission of data, voice, and video signals between ground-based stations and satellites in orbit. Here’s a simplified breakdown: Satellite Communications architecture allows for global communication coverage, making it possible for users to communicate over long distances without the need for a physical connection between them.

    Wireless Communications Blog

    What is WIMAX

    WiMAX, short for Worldwide Interoperability for Microwave Access, is a wireless communication standard that provides high-speed broadband connectivity over long distances. It is based on the IEEE 802.16 family of standards and is designed to deliver wireless metropolitan area network (MAN) and wide-area network (WAN) connectivity. Here are key features and aspects of the standard: …

    Wireless Communications Blog

    What is WIFI

    What is WIFI Wi-Fi, short for Wireless Fidelity, is a technology that enables wireless local area networking (WLAN) based on the IEEE 802.11 family of standards. Wi-Fi allows devices such as computers, smartphones, tablets, and other wireless-enabled devices to connect to the internet and communicate with one another within a local network without the need …

    Wireless Communications Blog

    Cellular networks

    Cellular networks, including GSM (Global System for Mobile Communications) and UMTS (Universal Mobile Telecommunications System), are mobile communication technologies that enable wireless communication between mobile devices and provide voice and data services. 1. GSM (Global System for Mobile Communications): 2. UMTS (Universal Mobile Telecommunications System): Key Features Common to Both GSM and UMTS: UMTS, being …

    Wireless Communications Blog


    CSMA/CA stands for Carrier Sense Multiple Access with Collision Avoidance. It is a network protocol used in wireless communication to avoid collisions in the transmission of data. Here’s a breakdown of how CSMA/CA works: In CSMA/CA, a device wishing to transmit data follows a procedure: This process helps in avoiding collisions by ensuring that the …

    Wireless Communications Blog

    What is CDMA

    Code Division Multiple Access (CDMA) is a digital cellular technology that allows multiple users to share the same frequency band simultaneously. Unlike Time Division Multiple Access (TDMA) or Frequency Division Multiple Access (FDMA), which divide the frequency band into time slots or channels, CDMA uses a spread spectrum technique. In CDMA, each user is assigned …

    Wireless Communications Blog

    Quadrature Phase Shift Keying

    Quadrature Phase Shift Keying (QPSK) is a digital modulation scheme that represents two bits of data per symbol. In QPSK, four different phase shifts of the carrier signal are used to encode the binary data. Each phase shift corresponds to a specific combination of two bits (00, 01, 10, and 11). The term “quadrature” refers …

    Wireless Communications Blog

    Quadrature Amplitude Modulation

    Quadrature Amplitude Modulation (QAM) is a modulation scheme used in digital communication to transmit data by varying both the amplitude and phase of a carrier signal. QAM allows for the transmission of multiple bits of information per symbol, making it a more bandwidth-efficient modulation scheme. In QAM, the amplitude and phase of the carrier signal …