What is a Single Sideband (SSB) Radio?
SSB radios are used for maritime communications on ships and yachts. They are part of the global maritime distress and safety system established under the International Convention for the Safety of Life at Sea (SOLAS).
Maritime SSB radios are also known as Single Sideband (SSB) radios. SSB radios provide fast access to over 700 channels. Medium frequency (MF) SSB radios have a range of about 400 nautical miles, while high frequency (HF) SSB radios have a range of 1,000 nautical miles.
Therefore, their coverage is greater than that of very high frequency (VHF) radios, which have a range of 35 to 50 nautical miles. The system comprises a rechargeable lithium-ion battery, a charger, an external antenna, and an automatic antenna tuner, designed for use by mariners and navies.
The State of California has stated that these batteries contain certain carcinogenic chemicals and must be handled with care. When charging the radio system, place it on a fireproof surface and avoid leaving it unattended for extended periods. In addition, it is recommended to install high-quality cables to ensure clear transmission.
While many people consider satellite phones useful in emergencies, SSB radios equipped with maritime transponders are the most practical tool, which can send distress signals to all nearby vessels and automatically notify rescue agencies.
In contrast, using a satellite phone only allows you to dial a single number. In addition, pairing an SSB radio with a Pactor modem allows you to receive weather faxes, GRIB weather data, and onboard emails.
You can choose an amateur SSB radio system that is cheaper than a maritime SSB radio, depending on your needs. However, obtaining an amateur radio certificate is more difficult than obtaining a maritime radio license or a long-distance certificate. Additionally, the more expensive maritime SSB radios are equipped with DSC (Digital Selective Calling) technology.
SSB radios were first used after World War II as part of navigation radio systems. The primary reason for introducing SSB radio systems was the problems caused by amplitude modulation (AM) radio systems.
One of the most significant disadvantages of AM radio systems is their high power consumption and undesirable space requirements. In addition, AM systems are not foolproof. Messages and information transmitted via AM systems can be intercepted and monitored through unauthorized channels, potentially compromising the transmission of important information and increasing the likelihood of emergencies.
Single Sideband Radio
Single-sideband radios offer a wide range of services, including two-way maritime radio systems for communication with captains, yachts, and coast guards. In addition, SSB radios are not affected by distance.
They allow easy communication and information transfer between distant yachts or vessels without interruption or distortion of the transmission. In addition to providing a completely secure communication channel, SSB radios also provide musical entertainment for the crew. Thus, SSB radios offer a comprehensive maritime radio communication system for the shipping industry.
However, a dedicated transmitter is required on board to receive and send information via SSB radio. If this equipment is not installed on board, SSB radio signals can be received using common radio transmitters, such as AM radios.
Due to the varying transmission channels, the audio modulation of AM radio channels can differ significantly. This can distort the information, leading to further confusion.
The appropriate system to correctly read the information sent by an SSB radio is a Beat frequency oscillator (BFO) or a carrier input oscillator (CIO). SSB radio systems represent a significant advancement in radio communications. This development will continue, helping mariners navigate and communicate more effectively than ever before.
