There are no radar guided SAM's that can fire on the move. There is no boat at sea that isn't "on the move". To enable a radar guided SAM to be fired at sea you need a ship the size of at least a frigate.
>>There are no radar guided SAM's that can fire on the move. There is no boat at sea that isn't "on the move". To enable a radar guided SAM to be fired at sea you need a ship the size of at least a frigate.<<
Well, I did say, "a relatively small ship", not a boat. Technically, why couldn't a missile such as a SA-6, not be fired from the deck of a small freighter that is cruising just fast enough to steady itself? Are you thinking that the targeting radar couldn't 'paint' the (rather large) target long enough for the missile(s) to reach it? What is different about the ship borne versions of these small SAM's? I not challenging your statement, just asking. Rememember, these guys have a way of using conventional things in unconventional ways.