A naval blockade of the coasts or ports of another State.

Additionally, a naval blockade of the island was implemented.

In 1916 the British had implemented a naval blockade against Germany.

But also because it was preceded by a naval blockade by Britain.

Fourth – a naval blockade of coasts or ports of another State.

Naval blockade of the coasts or ports of another State;

This was despite the naval blockade imposed by Britain.

In 1916 the British had implemented a naval blockade against Germany.

Major role in NATO blockade of Serbia and Montenegro.

The Palmer report clearly states that the naval blockade on Gaza is legal, but that the remaining components of the blockade are illegal.

The Palmer report does conclude that the Israeli blockade on Gaza is illegal, save for the maritime part of the blockade.

The committee was asked to relate to an assessment of the security circumstances of placing the maritime closure on the Gaza Strip and the maritime closure’s compatibility with the rules of international law. [emphasis mine]

Why maintain the naval blockade on the Gaza strip?

President John F Kennedy responded with a naval blockade of Cuba

November 20th: Kennedy suspends the American naval blockade of Cuba.