Prime Meridian – Greenwich Mean Time

In most cases, amateur radio operators record the time of a conversation (QSO) as Greenwich Mean Time (GMT) or also known as Universal Coordinated Time (UTC). Why? No matter where in the world the amateur radion station is located, GMT or UTC is the time refrence by which all amateur radio QSOs are logged, doing so eliminates potential errors or misunderstandings of individual station time zones. The same can be said for all emergency services radio communications and radio conversations between air traffic controllers and pilots of aircraft. The time reference for all essential service radio communications is Greenwich Meant Time (GMT). The prime meridian serves as the world’s standard time zone

Today my wife and I visited the Royal Greenwich Observatory the location of the Prime Meridian at Zero degrees Longtitude (0). Yep we are in London! The prime meridian divides the earth’s Eastern and Western Hemispheres. 15 degrees…