Maintenance, repair, retrofitting and refitting of yachts, vessels and related parts, namely, yacht and vessel optical alignment services for main engines and propeller's shafts, yacht and vessel propulsion shaft straightening; yacht and vessel main engine removal and renewal services; painting mega-yachts and boats; yacht and vessel plumbing and pipefitting services and the maintenance and repair of yacht plumbing systems, onboard hydraulic system maintenance and repair services for yachts and vessels, air conditioning, refrigeration and electrical systems installation, maintenance and repair services; diagnostic service for diesel engines, tuning of diesel engines and maintenance services for diesel engine parts; yacht rudder system maintenance, repair and custom renewal services; installation of yacht propulsion and rudder seals and related parts; repair of anchor windlass, yacht refitting, welding and metal repair services; yacht fiberglass structural and cosmetic custom repair and modification services, vessel water intrusion and delaminating repair services, yacht blister repair services, yacht fiberglass tank repair and custom fabrication services, carpet and wood repair services namely, interior and exterior yacht door, deck, hatch repair and modification services, heating, ventilating and air conditioning modification services, yacht engine repair services; custom ship and yacht building; vessel and yacht custom extension services; yacht hull and superstructure extension services; repair of yacht machinery, engine rooms and ship repair equipment; and installation in yachts of electrical lines and telephone lines