“航海图”的英语？

轮船的航线是标在航海图上的.The course of a ship is marked on a chart.领航员在航海图上标出船的航线.The navigator charted the course of the ship.船长在航海图上标出了这个区域,在这一区域里航行是相当安全的.The captain charted this area out and it's quite safe to sail in it....