Shipbuilding; underwater construction; underwater civil engineering construction services; underwater construction, repair and installation; underwater dredging; cleaning metal surfaces by underwater abrasion; cleaning non-metal surfaces by underwater abrasion; rental of underwater apparatus for cleaning by abrasion; submarine cable laying; assembly of submarine cables; advice and providing information with respect to shipbuilding and construction, underwater installation and repair; supervising (managing) shipbuilding and underwater construction works; repair, servicing, maintenance and cleaning of vehicles, land vehicles, vehicles for locomotion by sea, marine vehicles, underwater vehicles, air vehicles, drones; repair services in the case of vehicle breakdown; advice and providing information with respect to the repair, servicing, maintenance and cleaning of land vehicles, vehicles for locomotion by sea, marine vehicles, underwater vehicles, air vehicles, drones; electric vehicle charging; charging of vehicle batteries; rental of cleaning machines; rental of shipbuilding and underwater construction machines; mining extraction; installation, servicing, maintenance and repair of machines; rebuilding of machines that have been worn or partially destroyed; advice and providing information with respect to the installation, servicing, maintenance and repair of machines; installation, servicing, maintenance and repair of office apparatus; installation and repair of electric apparatus; installation, servicing, maintenance and repair of computer hardware; advice on information technology relating to the installation, servicing, maintenance and repair of computer hardware.