Collection: VHF/AIS antenna

VHF/AIS antennas: capturing essential maritime information

The VHF/AIS antenna is a crucial component of your communication and safety system at sea. At Skysat, drawing on our experience in offshore racing, we know that a high-performance antenna means clear information and optimal range. Discover our selection of antennas, rigorously chosen for their robustness and efficiency, and find the one that meets your specific needs.

choosing the right VHF/AIS antenna

Choosing a VHF/AIS antenna depends on several factors, including the type of navigation you undertake, the size of your boat, and the marine environment. It is essential to consider the antenna's gain, polarization, and compatibility with your VHF radio and AIS transponder. A well-chosen antenna ensures clear communication and reliable AIS signal reception, thus contributing to your navigational safety.

• Whip antennas: Standard solution, suitable for most uses. Check the impedance (usually 50 ohms).
• Short antennas: Ideal for small boats or cluttered environments. Compromise on range.
• VHF/AIS Splitters: Allow you to share a single antenna between VHF and AIS. Be aware of the resulting signal loss.
• Coaxial cables: The choice of coaxial cable (RG-58, RG-213, etc.) influences signal loss. Choose a high-quality cable of appropriate length.

the importance of installation and adjustment

Installing and tuning your VHF/AIS antenna are crucial steps for optimizing its performance. Incorrect positioning or faulty wiring can lead to reduced range and poor reception. It is important to follow the manufacturer's recommendations and ensure the antenna is properly grounded. A Standing Wave Ratio (SWR) test can be helpful for verifying impedance matching and optimizing transmission.

• Positioning: Install the antenna as high as possible and away from metallic obstacles.
• Wiring: Use waterproof connectors and check for corrosion.
• Grounding: Ensure a good connection to the boat's ground to avoid interference.
• SWR test: Check the impedance match between the antenna and the VHF/AIS radio.

GSM/4G antennas: Stay connected at sea

To stay connected to the mobile network during your coastal or offshore sailing trips, GSM/4G antennas amplify the signal and allow you to use your mobile devices or Wi-Fi routers on board. The choice of antenna depends on the sailing area and the quality of the available network. It is important to check the antenna's compatibility with the frequencies used by your mobile operator.

• Omnidirectional antennas: Pick up the signal from all directions, ideal for areas with weak signal.
• Directional antennas: Offer higher gain but require precise pointing towards the signal source.
• Marine-grade 4G routers: A combination of a 4G antenna and a Wi-Fi router, allowing the creation of a local network on board.
• Low-loss cables: Essential for minimizing signal loss between the antenna and the router.

💡 Skysat's advice

Before choosing your VHF/AIS antenna, map your usual navigation areas and anticipate typical weather conditions. An oversized antenna can be an advantage in areas with poor coverage, but an antenna well-suited to your regular use will offer better overall reliability.