Nevertheless, the Egyptians took this threat seriously and, on the eve of the war, during the late evening of 5 October, teams of Egyptian frogmen blocked the underwater openings with concrete.
Alligevel tog ægypterne truslen meget alvorligt og i natten før Yom Kippur-krigen blokerede grupper af ægyptiske frømænd de undersøiske åbninger med beton.