What is the term used to describe an amateur station that is transmitting and receiving on the same frequency?

The term used to describe an amateur station that is transmitting and receiving on the same frequency is known as simplex communication. In this mode, communication occurs in one direction at a time; one station transmits while the other receives on the same frequency. This is commonly used in various amateur radio operations, particularly in casual conversations and when utilizing equipment with limited capabilities.

In simplex operation, both parties must take turns speaking, which can sometimes lead to delays or interruptions if both try to talk at the same time. This method is straightforward and doesn't require additional equipment or configurations that might be needed for more complex modes of communication. Understanding this concept is essential for effective communication in amateur radio environments, especially during local nets or casual talk conducted on common frequencies.