Based in Annapolis and Queenstown, MD. 24 hr Emergency Diving Service. For over 25 years, ADC, a veteran-owned business, has provided year-round, professional dive services throughout the Greater Annapolis and Eastern Shore regions. Utilizing one of the most complete equipment inventories within the Bay area, ADC services include: hull cleaning & inspection, zinc replacement, propeller sales & service, salvage, search and recovery, piling restoration or removal, mooring inspection & installation. ADC provides complete salvage services for yacht owners, offering rapid response times that minimize damage to the vessel and related internal systems.