Final answer:
If a patient's condition worsens significantly during transport, the standard procedure is to head to the nearest hospital to ensure the patient receives immediate and appropriate care.
Step-by-step explanation:
If a patient deteriorates during transport and survival to the directed receiving facility is questionable, the standard action according to the Patient Transport Standard would be to proceed to the nearest hospital. This action is paramount to reevaluate the patient's status, provide immediate care, and potentially save the patient's life. It is the responsibility of the medical professionals in charge of the transport to make such a critical decision. In case of a medical emergency where the patient's survival seems doubtful, reaching the closest medical facility can make a crucial difference in the patient's outcome.