• Underwater damage and repaired structural Inspections for P&I Club, Insurance, Owner and Charterer
• Underwater CCTV-Color digital Video or Photo
• Pre-Purchase Surveys (Full hull afloat Inspection)
• Rudder & Tail Shaft Inspections and Clearances
• Hull Coating & surface Inspection
• U/W damage and repaired structural Inspections
• Hull Cleaning
• Propeller Super Polishing
• Sea chest blanking and plugging
• Propeller blade trimming
• Underwater Maintenance - Specialist Welding and cutting
• Sacrificial Anode Installation & Inspection
Sigma is dedicated to offering quality marine surveying services to its principals and customers.