The upper deck rail along both sides of a vessel to prevent anyone on board from falling overboard. In smaller ships they are usually of wire, supported at intervals by stanchions and sometimes secured at each end to the foremost and aftermost stanchion by a small cable stopper called a Senhouse slip. In larger vessels they are usually solid metal bars supported by the stanchions. Ships with bulwarks do not need a guardrail as the bulwark takes its place.
Subjects: Maritime History.