S1850M Long Range Radar S1850M Long Range Radar   S1850M is a long range radar for wide area search. With fully automatic detection and track initiation, it can track up to 1,000 air targets at a range of around 400 kilometres. The S1850M provides 3-dimensional track/plot data of the tactical threat and own forces within the operational environment. S1850M is the long range radar (LRR) of the Principal Anti Air Missile System used on the Royal Navy’s Type 45 Destroyers and French/Italian Horizon Frigates. It has also been selected for the UK’s Queen Elizabeth Class Aircraft Carriers.