This sepia 1960 film CHALLENGE OF THE OCEANS by the National Academy of Sciences is from a series of reports on Planet Earth. The film begins with brief underwater footage of a woman scuba diving (0:06-0:10). A researcher works with a tide gauge (0:11-0:27). Navy Scientists use nautical equipment to analyze the ocean floor and water samples (0:28-59). A ship navigates in tumultuous waters (1:20-2:03). The camera pans around the 1597 painting “Alexander Is Lowered Into The Sea” in a glass diving bell or “Bathysphere” by Indian artist Mukunda (2:13-2:23). Sailors and scientists perform research with a variety of quickly shown instruments (2:26-3:04). The ocean is seen from the decks and out a porthole (3:05-3:28). Time lapse footage of a rainstorm is shown (3:29-3:42). A sailboat moves at high speeds (4:11-4:31). An animation demonstrates the main surface currents, winds, and circulation patterns of the oceans (4:33-5:29). Researchers on a ship utilize a bathythermograph up-close, which is dropped into the ocean. It measures differences in salt and temperature. Ocean charts show the results of the testing (5:30-7:29). A time lapsed scene shows a physicist using a large model of a world map and simulates ocean currents with the use of inks (7:36-8:25). A Nansen bottle, a special device attached to a line covered in small thermometers, collects specific water samples by underwater photography (8:26-9:40). The results are first analyzed by scientists in a shipboard laboratory, briefly animated (9:41-10:16). A 50-gallon drum is used to lift water up from deep in the ocean for analysis (10:17-11:02). A swallow float is dropped overboard, and the basic principles are animated (11:03-12:19). Dolphins swim and underwater photography captures plant life and various fish off a coral reef (12:20-12:55). Plankton and diatom are captured and shown magnified (12:56-13:42). Schools of fish swim by while a scuba diver takes notes underwater (13:43-14:38). A trawl bag is utilized to capture sand from the ocean floor and analyzed (14:39-15:04). An underwater camera is shown being pulled out of the ocean and disassembled, and photos of the ocean floor include a shrimp, sea spider, brittle star, a sea cucumber, ripples, and manganese nodules (15:05-16:33). A precision echo sounder is demonstrated (16:34-17:16). Scientists in two ships use explosion seismology to explore the exact contents of the ocean floor (17:17-19:11). A magnetometer is towed behind a research vessel and the results studied (19:12-19:56). A vintage animation explains the basic composition of the ocean floor (19:57-20:36). A coring tube is dropped into the ocean and brings a large sample of cores (20:37-23:49). Scientist use vintage microscopes to study cores from the ocean floor (23:50-24:57). An aerial shot shows the tides of the ocean (24:58-25:18). A sailboat is shown, and researchers sail over rough waters (25:17-26:09).

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This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com