These include dollies, chocks, aircraft service stairs, aircraft refuelers, transporters, catering vehicles, and belt loaders. The coaches, which had no handbrakes, overrode chocks placed against two wheels. Prior to the use of wheel chocks, several vehicles had fallen overboard. Chains, chocks, block and tackle, oxygen-acetylene torches, and other automotive tools were carried. One or a number of "sheaves" are enclosed in an assembly between "cheeks" or "chocks". Therefore, "chocks" are typically found in pairs connected by a segment of rope or cable. Most commonly, chocks are seen on aircraft and train cars. The inquiry heard that all chocks were eventually accounted for. Unfortunately, the machine was powerful enough to crush the chocks and it gradually kept closing. Notable release included "Cyber Chess", "Stunt Racer 2000", "Galactic Dan" and "Chocks Away". Chocks are placed for safety in addition to setting the brakes. Chocks were also placed behind the wheels to limit recoil.