After an item of required safety equipment on a towing vessel fails, the owner or Master must consider all of these factors before continuing the voyage, EXCEPT the __________.

Correct Answer: Option C — estimated time of arrival promised to the customer

46 CFR 164.01 and general safety management systems prioritize the safety of the vessel, crew, and environment over commercial interests. ETA commitments are contractual and secondary to the Master's overriding authority to ensure safe navigation, weather assessment, and adherence to the principles of good seamanship.