Related Clues:

• See 18-Across
• Shipload
• See 15-Down
• Cologne unit
• Prevention measure?
• Cargo weight unit, perhaps
• Haulage unit
• 28.35 grams
• Brick measure
• A couple thousand pounds
• Krugerrand measure
• Won's follower?
• 512,000 drams
• Cargo measure
• It may be long or short