This is a high permeability RAM for broadband off-normal absorption. A nitrile elastomer was chosen for improved fuel resistance. False images or ghosts are indirect radar returns resulting from specular reflections of radar energy off the ship's own superstructure.
False echoes cause navigation hazards, and, if severe enough, can make radar navigation impossible.
Tuned to the frequency of the radar, the RAM is bonded to masts, stacks, yardarms and other reflecting structures. The lack of space available on modern warships causes electronic systems to be placed in close proximity. Often a signal or harmonics from one system will be received by or interfere with an adjacent system. This problem has become especially acute with the powerful broadband jammers currently being deployed, but it can be alleviated by constructing RAM barriers. Depending on the systems involved, singlefrequency, dual-frequency or broadband absorbers will be used.