![Air locks and caissons](/siteassets/images/air-locks-and-caissons_261x100.jpg?scale=both&format=webp&mode=crop&width=640&height=368)
Underwater technology services
At DNV we provide first-class certification as well as classification according to our own rules for underwater technology. Our know-how is based on over 40 years of experience in design assessment, approval, certification and classification of underwater products of all kind.