In cultured pearls, a mother-of-pearl bead or a piece of tissue is inserted (by man) into the mollusk to start the process. For both, the quality of the nacre dictates the quality of the luster, or shine of the pearl, which is very important to its beauty and its value.
For an airplane pilot, education takes many forms, including applied instruction, a high school diploma, an associate's or bachelor's degree, and specialized training. The Federal Aviation Administration also requires pilots to accumulate a lot of real-world knowledge in the form of flight-hours.
According to ICAO, to be eligible for a commercial pilot license, the applicant must be able to read, speak, write, and understand English: already hold a private pilot license, have received training in the areas of a commercial pilot, and successfully complete the relevant written exams. commercial pilot license (CPL), is a qualification that permits the holder to act as a pilot of an aircraft and be paid for his/her work. The basic requirements to obtain the license and the privileges it confers are agreed internationally by International Civil Aviation Organization (ICAO).