Only yesterday did we find out that the navy actually considered and TRIED the option of carrying a chain between two fast boats in order to disable the propeller of a ship this size. They found that it only worked in half the attempts. This means, if you attempt it twice, the probability of success is 3/4. If you attempt it thrice, prob. of success is 7/8. There was no reason not to attempt. See what the cost is for the method they chose.
Erekat on Palestinian radio: Israel's isolation is causing it to act belligerently (Haaretz)