To everyone making enraged comments about the fact that the automatic defense systems on the ship were turned off: Building an accurate naval picture is a complex matter, involving concentrating information from a variety of sources, and making many decisions based on past experience and intelligence estimations. To give you an idea of what this is like, try figuring out what's true and what's false in any talkback like this. If the automatic systems had been turned on, any fast flying objects in the area, including Israeli military planes and helicopters, jetliners, and even unusually fast flocks of birds could find themselves being blown out of the sky. The conduct of the crew of the INS Hanit was exemplary, and their damage control saved the ship and the crew from much worse harm. The problem was the intelligence, which didn't know about the existance of the C-802 missile in the area.
Italian FM arrives in Iran to promote economic, political ties (Reuters)
from the article: IDF finds bodies of missing sailors aboard damaged Navy ship