大圆航行

The world's largest, best designed, and most expensive sailing yacht, the famous 289-ft. Maltese Falcon, has been listed for sale via global online luxury marketplace List for $130 million. Built by Perini Navi for venture capitalist Tom Perkins in 2006, it remains the ne plus ultra of sailing superyachts, a masterpiece of technology and design, and was recently featured on the cover of Luxury Toys: Top of the World. Her revolutionary sailing system - the DynaRig - set a new milestone in yachting history: three self-standing and rotating masts hosting 15 sails for a total sail area of 25,791 square feet for unrivaled, performance maneuverability and record-shattering speed; she can complete Atlantic crossings in ten days.

【马耳他猎鹰，著名的有着289英尺长世界最大设计最好也是价格最贵的帆船，已通过全球在线奢侈品市场出售，开价一亿三千万美圆。2006年设计师 Perini Navi 为投资家 Tom Perkins 建造，至今仍拔得超级帆船的头筹，一个科技和设计的杰作，并且作为杂志的封面特写报道：她的世界顶级的革命性风帆系统--动态桅杆系统--在豪华游艇的历史里树立了新的里程碑：三个自动竖起并且旋转的主桅杆支撑着15片帆叶总共超过25791平方英尺的面积，无可匹敌的卓越可操作性能以及破记录的速度，使得她能在10天内完成穿越大西洋的航行。

Then, a Visual C++ program named Sailing Program is written to do following works: to calculate the parameters of rhumb line and great circle line ; to design the great circle line when it is necessary ; to design the composite line when it is necessary; to print tracks of rhumb line and great circle line on Mercator chart.

我们用Visual C++设计的航线设计程序，可以计算出两点之间大圆航线和等角航线的相关参数；如果有必要进行大圆航行的话，程序将计算出大圆航线的航路点；如果需要混合航行的话，程序将进行混合航线设计。

Ship always select rhumb line when the voyage is short while great circle line is the shortest route , so it is always used during the oceangoing voyage for the purpose of voiding the terrible environments in the high latitude sections , sometimes we have to turn to composite navigation line .

等角航线是最简单，短程航行中最常用的航行方式；而大圆航线是跨洋长距离航行时经常采用的，地理航程最短的航线；在大圆航行的过程中，有时为了避开高纬度地区的恶劣环境，我们还要选择混合航线。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。