OBC stands for onboard credit, a digital currency applied to a passenger's account on a cruise ship or passenger vessel. It is typically offered as a booking incentive, compensation for a service failure, or a loyalty reward. Passengers use it to pay for gratuities, drinks, excursions, or retail items before settling their final folio at disembarkation.
Heard on the job
The purser applied fifty dollars of OBC to our account to make up for the plumbing issue in our cabin.