To keep clear of British radar and stay undetected, the bombers had to fly at low level and so never attained the necessary height.

The British radars were not operating because it was Sunday-they were shut down for routine maintenance.

Early British marine radar, working in the metric bands, lacked target discrimination and range.

By mid-1942, British radars were available to meet all new South African needs.

Metox was the German answer to the British radar, rendering it completely ineffective.

They created a subtle jamming technique which increased atmospheric interference which degraded the performance of British coastal radars.

The low altitude groups would be able to evade detection by British coastal radar.

German forces also used offensive jamming of British radar, to enable fighter-bomber operations over England.

British radar reported them as six intruders.

The raids appeared to show that British radars were difficult to knock out.