Final answer:
When using radar, seeing something doesn't automatically mean it is a contact. Other factors such as weather conditions and interference can result in false detections.
Step-by-step explanation:
When we talk about seeing something on radar, we are actually referring to the detection of an object or target. In radar, a contact is any object that reflects or scatters the radar waves sent by the radar system. However, just because you see something on the radar doesn't necessarily mean that it is a contact. There could be other factors at play that may result in false detections or misinterpretations.
For example, weather conditions like rain, snow, or even birds flying in the vicinity of the radar can cause false echoes. Additionally, interference from other radar systems or electronic devices can also produce false detections. Therefore, it is important to analyze and verify the information obtained from the radar before assuming that it is a genuine contact.