De Onderwaterspecialist is a 35-year-old Den Helder-based diving-work and salvage company. It carries out its specialist work for, among other principals, governmental authorities, contractors, shipyards, shipowning companies, oil companies, offshore-services firms, shipping agents, and insurance companies. To be able to move fast, De Onderwaterspecialist disposes of instantly deployable, fully-equipped diving-work trucks. This company is an expert in underwater inspection work, torch-cutting, welding, drilling, sawing, concrete-structure repair, replacement of ship''s propellers, installation of cables and sinkers, salvage, and working with explosives.