Virtual Tour of CCB-18 CCB 18 is a Command-and-Control Boat, Tour (and History) that supported the mission of Task Force 117, the Mobile Riverine Force. As originally envisioned, the Mobile Riverine Force would support an infantry brigade and an artillery battalion using a variety of modified landing craft, support ships and specially designed assault boats. In essence this strike unit would be a self contained amphibious assault force, complete with all support elements except aircraft. The Mobile Riverine Force was comprised of U.S. Navy personnel plus a brigade from the 9th Infantry Division was chosen as the infantry component of the Mobile Riverine Force. Please allow a few minutes for all of the slide show photos to download. Click on the “Thumbnails” icon at the top right of the slideshow to scroll through thumbnail images.