sentences:  Any Obelisk based transmitters were primarily directed towards Alexandra.Their transmissions back then, as now, did not cover Cromwell due to shadows in their transmission path, plus the fact the transmitters being so high up, have blockers on their antennas to ensure they only transmit to certain areas, as 360 degree coverage was causing interference outside their intended broadcast area.Whilst Ice FM started in Cromwell it quickly set up a transmitter within a few months on 91.9FM and this was based at the Alexandra Airport.