Why an Egyptian blockade of Israel would invite outside intervention

What happens if the Egyptian Navy decisively defeats the Israeli Navy during the Yom Kippur War?

A blockade could follow, with outside relief escorts or deniable naval action raised as possible responses.

A decisive Egyptian naval victory is treated as an opening for a blockade. The proposed next stage is involvement by an outside power to prevent that blockade from succeeding. Direct combat is not assumed: escorting relief shipping is one possibility raised. Deniable submarine activity is another speculative option. The exchange later names the US Navy while illustrating the pressure a larger naval power could bring to bear.