. Challenger; the life of a survey ship. Challenger; Hydrographic surveying. 78 CHALLENGER. Approach route to Ras at Tannura. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ritchie, G. S. (George Stephen), 1914-. New York, Abelard-Schuman

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Keywords: ., bookcentury1900, bookcollectio, booksubjecthydrographicsurveying