Ok September 9, 1939 come across a HUGE convoy sailing west at 9Knts in sector BE61. The southernmost escort is just visible to me check the UZO and it give me a range of around 11.5 KM's its a hazy day around 10am so turn west and order flank to get ahead of the convoy next thing I see is splashes

WTF that escort SAW ME and is now charging hard, he had to have saw me because i didnt think they had radar in 1939 let alone flower class corvettes
Am I incorrect about the radar? or does GWX have eagle eyed escorts?