In the aviation industry, rather than spelling out letters individually by simply saying them (e.g. saying E for the letter E), we use the phonetic alphabet. This is to ensure that all pilots and controllers are able to communicate effectively across the globe, without risking miscommunication due to radio noise/static, accents, or by simple lack of clarity.
The NATO phonetic alphabet is the standard for aviation, and for the POSCON Network too. Below, you can find the entire phonetic alphabet, their morse code correspondent, as well as how to pronounce them.
When pronouncing individual letters on the Network, whether as a pilot or controller, you must use this phonetic alphabet. This applies to callsigns, as well as names of Fixes and radio navigation stations.