Text on inside covers. Pierced for binder. 'This chapter supersedes the whole of Chapter XI of the "Admiralty Manual of Hydrographic Surveying" (1948 Edition)' - title page verso.
Admiralty manual of hydrographic surveying. Vol.2: Chapter 4, Sweeping and diving. ISBN 0902539027. Published by Hydrographer of the Navy in 1969. Publication and catalogue information, links to buy online and reader comments.