English: The Royal Fleet Auxiliary ship RFA Argus pictured back in the UK having completed its deployment to Sierra Leone where it supported the fight against Ebola.The principal role of RFA Argus is to serve as a Primary Casualty Receiving Ship (PCRS). She has a fully equipped 100-bed medical complex on board, which can be uniquely tailored to deliver cutting-edge treatment afloat. The Primary Casualty Receiving Facility consists of over 40 different medical and surgical specialties, and is manned by personnel drawn from the MOD Hospital Units and Royal Marine Band Service. The unit has a state-of-the-art emergency department, resuscitation and surgical facilities, a radiology suite that includes a CT scanner, a critical care unit, a high dependency unit and a 70-bed general ward. As RFA Argus is fitted with self-defence guns and decoys and may have operational units embarked, she is not designated as a Hospital Ship as defined by the Geneva Convention and so does not display the International Red Cross symbol. Her secondary role is to provide specialist aviation training facilities for the Fleet Air Arm.