Echomax now offer the EM12 a popular corner 12inch ball reflector, for everyday or emergency use. The RORC recommend a mounting height of 4 metres above sea level or on small craft as high as possible. Mount in the catch rain position with the open corners facing the horizon. Mounting heights of 10-35 feet will give an approximate radar response between 4-7 nautical miles. In the catch rain position the EM12 gives a maximum RCS of 5.57m2 and an average RCS of 1.77m2.