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Flying first Blenheims and then the powerful Bristol Beaufighter with No. 604 Squadron RAF , by the end of the Blitz in May 1941 he had become the most famous night fighter pilot , successfully claiming 14 night raiders using AI ( Airborne Interception - the aircraft version of what later became known as radar . )
 No. 604 Squadron RAF
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 No. 604 Squadron RAF