Originally Posted by Stratoliner777

A poster on another aviation forum, who seems to be knowledgeble in such matters as they pertain to European aviation, says that in European airports there are "lighted stopbars" (which can be red to warn aircraft from entering an active runway), and if a red stopbar is crossed, an alert would be sounded; moreover, there should be systems that could track the position of the Coast Guard plane through its transponder, or other ground based systems, and in so doing alert the control tower to a runway incursion; and potentially other runway safety features.