n.额发；前桅楼
Range estimates from the foretop would not have been very useful at that time, especially given the decimated gun crews and difficulties relaying data. (Flags were probably used from the foretop to the gun). 这种测距方式并不精准，特别是在船身剧烈摇晃或者是火炮烟硝阻碍观测视线的时候。）
