The second plan—codenamed the ""High Minarets""—called for a crossing at five separate areas along the length of the canal. The Egyptians would advance , then establish defensive positions. By restricting their advance, Egyptian ground forces would remain within range of their own SAM defences, which would provide a protective "umbrella", negating the Israeli advantage in the air. In this way the High Minarets was planned in accordance with the capabilities of the Egyptian Army. The plan's outline was completed by September 1971 in absolute secrecy.