Related Clues:

• Gulf of Mexico structure
• Canine, for one
• Basic training
• Marines' training center
• Spindletop structure
• Drilling platform
• Deepwater Horizon, for one
• Like some drilling
• Brush target
• Well-drilling structure
• Offshore eyesore, to some
• Crown holder
• Well-drilling equipment
• Bonelike structure
• Projection of a gear wheel