Admiralty manual of hydrographic surveying
Great Britain.Hydrographic Department.
[Taunton] Hydrographer of the Navy,
1969
Pierced for binder
'This chapter supersedes the whole of Chapter X and parts of Chapter XVII of the "Admiralty manual of Hydrographic Surveying" (1948 Edition)' - title page verso
Hydrographic surveying.
Sounding and soundings.