The master or individual in charge of a vessel prepares a certificate of discharge for each mariner being discharged from the vessel where the original discharge goes to the _________.

Correct Answer: Option B — Mariner

Per 46 CFR 14.209, the Master must provide a Certificate of Discharge to the mariner upon completion of their service. This document serves as the official record of the mariner's sea service, which they must retain for future credentialing applications and to verify their professional experience to the Coast Guard.