The Target Navtex Pro is packed with features yet remarkably easy to install and use. Careful care has been taken to ensure that this unit is very easy to use, in fact you should bring the extensive instructions for use, it is possible to program the device via the on-screen menus - this is really that simple. The messages are displayed on a high-contrast, backlit liquid crystal display with a clear line space between the messages to support the location - this is necessary as the device has a very large memory. You can rest assured that you will always have data up to the minutes as memory overwrites the oldest messages when it gets full. However, you can delete the data storage at any time if you wish. Its like a continuous stream of paper - without the mess or cost! Navtex is of legal age, a free worldwide information service in English. A Navtex receiver quickly becomes an essential device and the Target Navtex Pro is state of the art. This excellent device comes complete with its own active antenna and is designed to stay at continuously consuming stingy 40mA. Can you afford it? Program status can be viewd and changed at any time Easy to read text on high contrast backlit LCD Current consumption 40mA + 200mA for switchable backlight Dimensions - W 220 x H 98 x D 48mm AERIAL - Active 195 x 40mm stub type with 7 m cable.