Dry docks, graving docks and construction docks

What is the difference between a dry dock, a graving dock and a construction dock?

Dry dock is the broad term, a graving dock is a fixed excavated form, and a construction dock may add access designed for assembling large hull sections.

Dry dock is the broad category and includes both floating docks and fixed shore facilities. A graving dock is excavated into the ground, closed at the water end and commonly stepped along its walls. Modern construction docks can differ by using ramped access so large prefabricated ship sections arrive on multi-wheel transporters rather than only by crane. Terminology varies by country and period, and some fixed docks serve both repair and construction roles.