Small Vessels:
• Yacht fuel tank: 50-500 gal (0.07-0.67 ton reg)
• Fishing boat: 200-2,000 gal (0.27-2.67 ton reg)
• Pleasure craft: 20-200 gal (0.03-0.27 ton reg)
• Work boat: 100-1,000 gal (0.13-1.34 ton reg)
Commercial Vessels:
• Cargo ship: 50,000-500,000 gal (67-668 ton reg)
• Tanker vessel: 1M-10M gal (1,336-13,360 ton reg)
• Ferry: 5,000-50,000 gal (6.7-67 ton reg)
• Tugboat: 1,000-10,000 gal (1.3-13.4 ton reg)
Register Ton Definition:
• Historical unit: 100 cubic feet
• Volume measure: cargo capacity
• Maritime standard: vessel registration
• Modern usage: shipping calculations