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You can pass over it in a ship but to go to the sea floor in it you need a special bathysphere.
You will need 2 pilots
Pilots need to study aerodynamics because they don't get chance how to do this. So they need to study before flying.
If they don't then small bubbles can form in their blood, and in some severe cases it can kill them.
To show where they have flown
Volunteer Pilots Association's motto is 'People Flying People in Need'.
Well... they need to know how to fly a plane
no
"rar" is a compression technology. to "unrar" you need software that can 'decompress' the files. Such software is for example "WinRar"
Pilots need to know wind velocity because, when landing and taking off, they need to adjust their power and other settings for wind to be able to stay on course.
A .rar file is not a media file. It is a compressed archive. The archive itself may well contain one or more media files within it, but you must decompress the file to open them. In order to decompress a .rar file, you need a utility like WinRAR to open it.
There are many types of submersibles some of them are; ROV's (Remotely Operated Vehicles), AUV's (Autonomus Underwater Vehicles), MIR-1 and MIR-2 which are operatred by the Shirshov Institute of Oceanography, the Alvin model which is operated by Woods Hole Oceanographic Institute, the Johnson SeaLink submersible which is operated by the Harbor Branch Oceanographic Institute in Fort Pierce, Florida. That is just a few of the types of submersibles out there, if you need more go pick up a Marine Science text book.