Normally, the airspace surrounding Class D airports extends from the surface up to a designated MSL altitude - usually about 2,500 feet AGL. Entry requirements: To enter Class D airspace, a pilot must contact the control tower and establish two-way radio communications prior to entering the airspace.
Embedded Data: A DVD-R disk (also applies to DVD+R) which still has space available. Data is burned onto the disk with a writing laser. DVD recordable and DVD rewritable refer to part of optical disc recording technologies.
Difference between DVD R, DVD RW, DVD-ROM, CD-R, CD-RW and CD-ROM. What are the difference between DVD R, DVD RW, DVD-ROM, CD-R, CD-RW and CD-ROM? What does the - and stands for why not use - for all of the discs or for all the discs?