How long is a credential issued by the U.S. Coast Guard for apprentice mate (steersman) of Towing Vessels valid for?

Correct Answer: Option C — 5 years and must be renewed

In accordance with 46 CFR and 46 CFR 10/11 standards governing merchant mariner credentials, deck officer and towing vessel credentials, including apprentice mate (steersman), are issued with a standard five-year validity period before requiring renewal.