Marine Physical Laboratory Technical Memorandum 420. Deep submergence facilities are now considered to be a vitalcomponent of the U. S. Navy fleet and the National OceanographicLaboratory System facilities inventory. Scientific use of mannedsubmersible systems is now routinely applied to a broad range ofscientific disciplines. Advancements in deep submergencetechnologies continue to require evaluation and assessment for theirscientific support potential. This study report assesses the scientificsupport potential of a specific new diver lockout submersible, theMARITALIA (3GST9), that may be added to the U.S. Navy deepsubmergence facilities inventory.
ANTIPODE Legs II and III, from San Francisco to Adak and Adak to Tokyorespectively were conducted by the R/V MELVILLE between 6 July and 19 August1970. Deep Sea Drilling Project (DSDP) site surveys were conducted in conjunctionwith seismic refraction anisotropy surveys at most stations. This report willsummarize just the site surveys while the refraction data will be published elsewhere. The chief scientist for both legs was George G. Shor, Jr.
In using the data available during the conduct of a bearings only approach two rather different procedures are usually followed.
One is to attempt the complete solution for range, course and speed by taking usually six bearings while maneuvering the submersible in a rather specialized way. The other methods involve the use usually of three bearings and an assumed range or speed to calculate the course and the speed or range (whichever was not assumed).
The purpose of this paper is to show that using four bearings it is first actually possible to solve the problem completely (range, course and speed solution) in a very general way, and second to give in detail several simple, direct methods for making such a solution without restricting the motion of the submersible.
