(1) Close-up examinations of: frames, webs and bulkheads in selected cargo holds and tanks; ballast tank internal structure; hatch covers and coamings; deck structure and underdeck plating between cargo hold hatches; and areas of inner bottom plating; (2) thickness measurements of deck and shell plating, and hull internal structure; and (3) cargo and ballast tank pressure tests.
What are the principal elements of enhanced surveys?
