Terrorist Frogmen.

We've been hearing about the threat for years.  If memory serves this is the first example of it actually being attempted.  via Fox News.

The spokesperson said they were heavily armed and dressed in diving gear -- and they were trying to swim to shore when a firefight erupted.

An army source told Haaretz that the firefight about 4:30am (local time) was a success for the Navy's elite commando unit, Shayetet 13, and prevented a rare attempt at a seaborne attack on Israel.

There were no Israeli casualties.

Also noteworthy is the naming of the unit here.  I imagine the guys at Shayetet 13 were looking for a little payback after the recent embarrassments.

S13 is suppose to be the second highest speed unit of Israeli Special Forces (the first is the Sayeret Maktal...they supposedly work directly for the General Staff.  Their participation in the cruise ship incident is doubtful due to intelligence indicating that their would be no issues with the boarding of the ships)....