The 5911 Classic Emergency VHF antenna is a 10"  tall Unity Gain Loaded 1/4-wave antenna. It is especially designed for Emergency situations, if your main antenna becomes broken or disabled. The VHF 5911 flex antenna is a boating essential. It comes packed in a 12” weather-resistant, plastic tube which can be easily stowed away. Complete with 12 feet of coax cable & PL259 connector with rubber suction cup. Mounts quickly and easily on any smooth horizontal surface.