Where is Point D in the Arctic?

The term "Point D" is not a standard geographic designation widely recognized in Arctic studies or cartography. It might refer to a specific location in a particular research study, exploratory mission, or documentation that uses that nomenclature. If you have more context or details about what "Point D" refers to—such as a specific research project, expedition, or a particular map—please provide that information, and I would be glad to assist you further!