fife rail
noun
1- chiefly historical a rail round the mainmast of a sailing ship, holding belaying pins〈主史〉（帆船的）桅杆栅栏。
1.1
- the rail on top of the bulwark at the edge of a sailing ship's poop or forecastle（帆船船尾楼或船首楼边上舷墙顶上的）船尾楼围栏。
词源
early 18th cent.: of unknown origin.