预见航行
掌好舵，去更远的海。油门和舵轮很快到位，船体要过一阵才跟上。从南侧码头出发，驶过两枚浮标之间的口门，下一座港口才出现。燃料只在进港时补充。
An inertial sailing game for iPhone. The throttle and wheel answer at once; the hull does not. Leave the south quay, pass between two buoys, and the next harbour appears. Fuel comes only when you make a harbour.