Activities of Art Sub are high specialized services for sea and land works in harbour, state, and sectors. Specifically, operating activities are focussed on waterfront construction and carpentry both on land and in water, supported by qualified Underwater Technical Operators, holding the required authorizations for diving, as well as professional skills in waterfront construction, carpentry, (certified) underwater cutting and welding operations, installation of underwater ducts and relevant laying-down of collars and anchorages for landing places, piers, signalling buoys, and laying of mooring catenaries….