Another significant point is that Judea and Samaria are mountainous. The costal plain is flat. Therefore, defending the main population of Israel is very difficult.

As the maps make clear, while radar coverage from the coastal area (lower map) could not detect enemy aircraft approaching Israel from the east prior to their crossing of the Jordan Valley, radar coverage from Nablus (upper map) can detect aircraft well within Jordan.

Thus, while Israel's warning time without radar installations in Judea and Samaria was only a few seconds, radar coverage from the mountain ridge near Nablus provides precious minutes of warning time for Israel's main population centers in the costal area.