HF Automatic Antenna Tuner.Tune in your HF marine world.Suitable for many vessels.The versatile AT-130 can be used with a variety of vessels, even smaller boats that cannot use a long antenna element.For example, the AT-130 will match a 7 m (23 feet) long wire antenna across the marine band in the 1.6 - 27.5 MHz range.Automatic tuning No manual tuning is needed.Just push the [TUNE] switch on an Icom HF marine transceiver the AT-130 adjusts the antenna and the transceiver to the minimum SWR in any frequency on an HF marine band.The AT-130 allows you to transmit with strong RF output power, and is perfect for maritime mobile operations.Weather resistant The AT-130 is housed in a durable, completely weather-resistant acrylic case with rubber gaskets.This allows it to be conveniently installed near the antenna element base.For Icom HF marine transceiversIcoms sophisticated AT-130 easily matches Icom HF marine transceivers.The AT-130 easily interconnects with an Icom HF marine transceiver.AT-130 installation is simple.No adjustments are necessary.Just connect the control cable and antenna wire and go Quick tune-up Improved tuning performance..the tune-up time is less than 3 seconds in any frequency on an HF marine band.In addition, the AT-130 has 8 convenient memories to store tuning information.Retuning for a memorized frequency takes about 1.5 seconds.This allows you quick trouble-free frequency changes.Low power tune-upThe AT-130 emits very little output power (just 300 mW) during the tuning process.This reduces the possibility of causing interference to other stations using the frequency.