When may foreign credentialed personnel be employed on a US-flag towing vessel?

Correct Answer: Option D — While on a foreign voyage and outside US jurisdiction, in order to meet manning requirements

46 U.S.C. § 8103 permits the employment of non-US citizens on US-flag vessels only when the vessel is on a foreign voyage and outside US jurisdiction. This exception is strictly limited to instances where necessary to meet manning requirements, provided the vessel is not operating above the US outer continental shelf.