Although our maritime heritage is young compared to the Vikings', our country has thousands of cultural resources such as shipwrecks, shell middens, and sunken vessels from WWII, that lie under or adjacent to the Mid-Atlantic's coastal waters. This presentation examines how different aspects of climate change, including ocean acidification, impact our heritage resources. It defines the diverse cultural materials affected, and considers the potential and resulting effects on archaeological research, the environment, and the economy. In addition, means of addressing these effects, both active and proposed are discussed. One example involves a survey of archaeologists associated with government agencies, academic institutions, and non-profit organizations who all placed ocean acidification in the top three most damaging climate change threats they face in their work. This has led to increased networking at a global level as we enter the U.N. Decade of Ocean Science for Sustainable Development.