My '88 Tiara has a HALON system that is no longer serviced. The insurance company (Boat U.S.) was happy with the Federal required number of portable fire extinguishers I carry. The HALON system still shows green lights. Fortunately I have never needed it. There is one in the bunk room, one in the galley and a big one at the sliding door. Thinking of adding another on the bridge. Capt. George