I would suggest going to your local library, non-fiction section, find some books on the Battle of France and the Battle of Britain in WW2. The main weapon they had against shipping was the JU-87 STUKA, which was defenseless against Hurricanes and Spitfires. The 110 was also no match for RAF fighters, and the Germans quickly discovered they were useless as escorts because they needed escorts themselves, so every time they ventured over the channel they were shot to pieces.
As for low altitude flights to defeat radar, there are entire books and chapters devoted to the rapid advances in the capabilities of British Chain Home and Chain Home Low radar in 1940.
But don't take my word for it, research it.
