Presentation is made the paper to the helicopter operation pattern, selection, and laying out of operation area, provision of indication markings, lighting, fire fighting and safety appliance for helicopter operation area on various types of ship.

From the respect of the safety of computer system, on the basis of the difference betweenlogic partition sign in partition table of popular operating system DOS and that of Windows9x of PC,the paper discusses how to encrypt particular partition and restore function by means of programming.

Study on the Development of the Semiotic Tourist Area and the Destination;