Specifications 30range (nm) I bandfrequency Used by 1965 Hecla class support ship AO 11973 Type 82 Bristol class guided-missile destroyer DDG 11975 Type 42 (Batch 1 and 2) class guided-missile destroyer DDG 11979 Type 22 (Batch 1) Broadsword class frigate FF 11980 Invincible class aircraft carrier v stol CVS 21981 Castle class patrol vessel corvette FS 11983 Type 22 (Batch 2) Boxer class frigate FF 11987 Argus class helicopter carrier H 1 In Service Royal Navy indonesian navy South African Navy Chilean Navy Royal Fleet Auxiliary