Alarms can be either motorized bells or wall mountable sounders or horns. The Vancouver Whitecaps have longstanding rivalries with both Seattle Sounders FC and the Portland Timbers. Jones is a fan of the MLS team Seattle Sounders FC. On March 14, 2015 Long signed with Seattle Sounders FC 2. Sonar echo sounders confirmed this in the early twentieth century. The Cascadian flag has become a popular image at Seattle Sounders and Portland Timbers games. He was later invited to trial with league rivals Seattle Sounders FC in August 2009. Drew Carey is the chairman of the Sounders FC Alliance. Once the Sounders returned to Seattle, Ljungberg joined in training. He then left the Baseball Ground to play for NASL side Seattle Sounders. He now works as a local broadcast analyst for Seattle Sounders. The Silverbacks ended up losing to the Seattle Sounders. He signed for the Seattle Sounders of the NASL in 1976. The first major use for electromagnets was in telegraph sounders. DSTO uses Four-Receiver Digisonde Portable Sounders (DPS-4), also built by Lowell.