geographic reference points การใช้

• On city maps, the wards continued to be used as geographic reference points until 1928.
• The name derived from it being the geographic reference point " Y ", pronounced " Yankee " in the NATO phonetic alphabet.
• Electronic tactical air navigation ( TACAN ) became an absolute necessity in Laos, where mountain peaks and unexpected inclement weather made flying extremely hazardous, especially for older aircraft . This problem was solved by establishing unmanned Air Force stations that broadcast continuous radio transmissions, allowing aerial navigation from fixed geographic reference points.