Before starting on a sea voyage,prudent navigators learn the sea charts,study the sailing directions,and memorize lightouse locations to prepare themselces for an conditions they might encounter.

• 在开始一次海上航行之前，谨慎的航海家们学习航海图，研究航行方向，记住灯塔的方向，为他们可能遇到的情况做好准备。