Firestik Railroad Base Antenna RR-BASEFirestik Railroad Base Antenna RR BASE The IBA 5 was primarily designed to be used from the inside of a building or structure. The main user of this product would be a CBer who lives in an apartment or association area that restricts the use of outdoor antennas. Other uses may include single family residences, offices, and job sites. The IBA 5 may also be useful to hunters and campers (on the ground or roof of your RV) to establish a temporary