The Royal Passenger Liner ferry leaves Pattaya for Hua Hin on Thursday on its delayed inaugural service, escorted by the frigate HTMS Kraburi. (Photo by Chaiyot Pupattanapong The navy has assigned the frigate HTMS Kraburi to protect the Pattaya-Hua Hin ferry, which made its first trip on Thursday after rough seas delayed the unofficial launch from Jan 1. The frigate was already deployed in the upper part of the Gulf of Thailand, the navy statement said.