It is nice to see them there when they do, and I'm sure it makes the terrorists worry that they might be around. It's all fine by me.
What could the Coast Guard do if there was trouble in rough water, at 30 knots, in a dense fog or strong wind and rain? Which is likely when the Jihadists would choose to strike. Ask the WA State ferry system if there are enough life boats for 600+ people, you will be shocked.