... .4" LCD Marine Radar With AIS Function 1.Marine Radar 2.Specialized for middle and small vessel 3.High brightness rad 10.4" ... LCD Marine Radar With AIS Function ... 125, 0.25, 0.5, 0.75, 1, 1.5, 2, 4, 6, 8, 12, 16, 24, 36, 48**, 64** Ring ... , 0.25, 0.5, 0.5, 1, 1, 2, 2, 3, 4, 6, 12 **KR-1668C4. Echo Trail Interval: 15s, 30s ...