What tense is shown in "He has been waiting for over 12 hours at the Airport. His plane is delayed badly because of the weather."?

The tense used in the phrase "He has been waiting for over 12 hours at the Airport" is indeed the Present Perfect Continuous. This tense is formed using "has/have been" followed by the present participle (the -ing form of the verb). In this context, it indicates an action that began in the past and is still ongoing or relevant to the present moment, which is highlighted by the duration "for over 12 hours."

The focus here is on the activity of waiting that continues up to the present, emphasizing both the duration and the ongoing nature of the action. The mention of the delay due to weather further reinforces its current relevance, showing that the circumstances affecting the waiting are still in play.