Old frogman, sailor, boatbuilder, novelist and chronic rabble rouser.
You can read the first third of my novels, gratis, at my website link just below.
Don't discount the Suez Canal, which is low-hanging fruit.
A ship moving along a straight line at low speed is as easy to hit as a stationary point target.
It's not a CVN turning sharply at 30 knots.
Also: spotters on land can relay the target ship's name, nationality, exact location, and exact speed, second by second, for precise targeting.