Related Clues:

• Mat's a freewheeler
• Goes all around Ireland, for instance, for short historic time in boat
• Small mat; cargo ship
• Trading vessel or schooner may rest on it
• Ship; small mat
• Company behind brief for surface protector
• Mat for glass
• Mat to protect a table
• Wheel around old ship
• Vessel -- and what might go under one
• "The drink's on me" speaker?
• Amusement park ride, informally
• Water-ring preventer
• Ship mat
• Admiral's first aboard damaged escort vessel