Inspection planning and commercial screening estimate only. Drone inspection suitability depends on the structure, compartment, visual line of sight, communications, lighting, atmosphere, access restrictions, surface condition, image resolution, sensor capability, survey objective, class or flag requirements and whether physical contact is required. Remote inspection may reduce access requirements without eliminating them. Thickness measurement, NDT, cleaning, hammer testing, destructive testing and other close-up work may still require personnel or physical access. Scaffold productivity varies materially with geometry, height, congestion, staging, permits, labor availability and safety requirements. Weather, ventilation, confined-space preparation, gas freeing and other operational prerequisites are not automatically calculated unless included in the user's productivity and downtime assumptions. Validate the final inspection plan with the vessel, surveyor, class society, flag requirements, drone service provider and access contractor.