Which radio phraseology is appropriate for requesting runway access while escorting another vehicle?

The correct answer is the option that effectively communicates a request for runway access while clearly identifying the vehicle being escorted. Using a phrase that includes the unit call sign along with a reference to the additional vehicle provides specificity and clarity. This is particularly important in airfield operations to ensure that all parties are aware of the situation.

In the correct response, the phraseology includes essential information: the specific controller being addressed (the tower), the unique call sign (TBOLT1 plus one), and the request for runway access along with the location (from Taxiway Alpha). This level of detail is crucial for maintaining safety and ensuring that the air traffic control tower is fully cognizant of the transaction, which helps prevent misunderstandings during busy operational periods.

Other options may lack the necessary clarity or protocol required for such a request. For instance, simply stating a desire to enter the runway without a specific identification can lead to confusion, especially in a busy airfield environment. Thus, the details encapsulated in the correct choice ensure that the air traffic control personnel can respond accurately and safely accommodate the request.