Yes, primarily Navy ASW. There are some fitted out for other intelligence gathering (remembering the one that the Chinese pilot ran into a few years ago). Looks like the customs folks have a few that they use primarily for offshore work. It may be one of theirs rather than a Navy one.
They’ve been used extensively in Afghanistan too. I was a little surprised to see sub hunters 700 miles inland. They are loaded for bear, electronically speaking. A new version is on the way; known as Neptunes I believe.