Complex sentence: The decoy site had a small underground bunker that housed a generator, this was used to power a decoy'flarepath' in addition to rotating lamp to be used to give the impression of a taxiing aircraft.
Split into simpler sentences: The decoy site had a small underground bunker that housed a generator. This was used to power a decoy'flarepath' in addition to a rotating lamp to give the impression of a taxiing aircraft.