Previous posts in this discussion:
PostUK Radar Technology at Battle of Britain (John Heelan, UK, 02/13/18 4:48 am)
David Fleischer wrote on February 11th: "The RAF [in the Battle of Britain] could pinpoint exactly where the German bombers were coming in and rise quickly to the attack."
Not quite! Radar technology (Chain Home) at the time was fairly primitive, with an absence of aerials (no oscillating or downward-looking aerials) that could determine the height of an incoming attack. (I spent two years of my National Service working as a fighter plotter in Air Defence operations bunkers scattered around the UK.)
German pilots soon learned to avoid being detected by flying under the radar shadow and hugging the waves until Chain Home Low was developed. This was particularly true of the station on St. Boniface Down (750 ft above sea level) on the Isle of Wight that suffered attacks using this manoeuvre.
JE comments: John Heelan reminds us that "flying under the radar" used to be literal. John, do you know if the Americans at Pearl Harbor had the same level of radar technology? This was a full year after the Battle of Britain. I recall the scene from Tora! Tora! Tora! in which the radar technicians see the incoming blips, but are not taken seriously by their incredulous higher-ups.
A "time flies" epiphany: TTT (1970) was made only 29 years after Pearl Harbor. An equivalent time lapse now would be a film about the fall of the Berlin Wall (1989).