China Defense Mashup has posted pictures of a trimaran vessel purported to be the second of a class of rescue vesssels that look very much like smaller versions of the Independence class Littoral Combat Ships. (Click on the photos to enlarge.)

It appears to have a helicopter landing deck, a small gun (25-40mm), and stations for making pickups at near the waterline on the outer hulls. Apparently these belong to the  Navy, rather than one of the five civilian agencies that do Coast Guard type work.