Use of stabilised electronic bearing line (EBL)

So far, gyro input has been excluded from this paper. In pilotage, gyro compasses are frequently observed to be in error, lag during turns and sometime just wander. Perhaps new compass technology will increase the confidence in which heading input can be relied upon. Whilst some radars only have relative bearings in the head up orientation, others have or offer stabilised EBLs or true bearings. In such cases, the range and bearing of the reference point from the turn centre can be set on the EBL that is offset abeam at the desired radius. If the stabilisation is reliable, targets on the beam become sensitive to turn rate with the same guide that if the target is above the bearing line, the turn rate is too high and if the target is below the bearing line, the turn rate is too low.

Head up EBL