Complex sentence: It is the fire control radar component of the Sea Viper naval air defence system, previously designated PAAMS (S) to distinguish it from the PAAMS system on the Franco-Italian Horizon Class.
Split into simpler sentences: It is the fire control radar component of the Sea Viper naval air defence system. It was previously designated PAAMS (S) to distinguish it from the PAAMS system on the Franco-Italian Horizon Class.