Iran is famous for anti ship missiles. At one point they were stationed around the Mediterranean in its various client states. They were or are a serious hazard to shipping in case of hostilities.

Perhaps Q's "Missiles only." meant the airstrike targets were Iranian antiship missiles?

From 2013:

https:// www.theguardian.com/world/2013/mar/17/obama-visit-israel-syrian-missiles-transfer

Israel to ask Obama to use air strikes in case of Syrian missile transfer

…

The Obama administration has made clear that it would intervene militarily only to stop the Assad regime using its chemical or biological weapons or transferring them to extremist groups. Israeli officials say they feel they have been left alone to deal with the spread of Syria's arsenal of anti-aircraft and anti-ship missiles.

…

Israeli warplanes destroyed a Syrian convoy at the end of January which Israeli officials say was taking Russian-made ground-to-air missiles to Hezbollah.

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"These missiles are not just a problem for Israel," the official added. "They include [anti-ship] missiles, and who has the biggest navy in the Mediterranean?" – a reference to the US. Israeli military and government officials concede that it is unlikely that they will be able to persuade Washington to take military action in Syria unless chemical weapons are involved.

…

"What I hear over and over again from Israeli generals is that another war with Hezbollah is inevitable," a western diplomat said, pointing to estimates that the Shia militia has up to 60,000 missiles hidden in southern Lebanese villages.