Nicholas H. Heck
Nicholas H. Heck | |
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United States of America | |
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Battles/wars | World War I |
Captain Nicholas Hunter Heck (1 September 1882 – 21 December 1953) was a career officer of the
Early life
Nicholas Hunter Heck was born on 1 September 1882,[1] the son of John Lewis Heck (1843–1927)[1] and the former Mary Frances Hays (1848–1904),[1] in Heckton Mills – a settlement named for his grandfather, Dr. Lewis Heck (1810–1890)[1] – in Dauphin County, Pennsylvania, near what is now Heckton. After primary and secondary education at private schools in Harrisburg, Pennsylvania, Heck attended Lehigh University, from which he graduated with a Bachelor of Arts degree in 1903 despite enduring an attack of typhoid fever. He continued to study at the university for an additional year, receiving a Bachelor of Science in civil engineering in 1904.[1]
Career
Wire-drag surveying
After completing college, Heck accepted civilian employment with the
World War I
The United States entered World War I on the side of the
On 24 September 1917, the day of his assignment to the Navy, Heck was commissioned as a lieutenant in the Naval Reserve Force, and on 9 October 1917 he was assigned to the Naval Experimental Station at
On 15 December 1918, Heck returned to New London and resumed his duties at the Naval Experimental Station. On 25 February 1919, he received a promotion to lieutenant commander in the Naval Reserve Force. His Navy duty came to an end on 19 March 1919.[4]
Echo sounding and radio acoustic ranging
Early experiments
Heck returned to duty as a Coast and Geodetic Survey Corps officer on 20 March 1919,[4] bringing with him the experience in underwater acoustics he gained during his tour with the Navy, as well as contacts with U.S. Navy, Royal Navy, and United States Army Coast Artillery Corps researchers investigating the practical application of acoustics in an ocean environment.[5] During the next few years, developments in the application of acoustics to depth sounding and navigation would afford him an opportunity to revolutionize hydrographic surveying techniques.
By the immediate post-World War I period, research into the use of acoustics had resulted in a primitive ability to use sound to measure depths by bouncing it off the sea bottom and measuring the time it took the sound to make the round trip.[6] By early 1923, experiments in this area by the United States Department of the Navy, as well as by the French and the British,[7] suggested to Heck that the Coast and Geodetic Survey should look into adopting this new technique of echo sounding into its surveying work,[6] using it to make depth soundings in deep water more quickly and cheaply than it could by deploying long lead lines all the way to the bottom from survey ships; a 20,000-foot (6,096-meter) depth could be measured in only about eight seconds with an echo sounder, while the use of a lead line to determine the depth could take an hour.[8]
In addition,
Realizing the potential of these applications of acoustics to hydrographic surveying and
Heck agreed, but believed that existing navigation aids would not meet the needs of the Coast and Geodetic Survey in terms of the immediacy and accuracy of position fixes.[7] He envisioned improving on previous concepts by creating what became known as the radio acoustic ranging (RAR) method. In Heck's concept, a survey ship's crew would drop an explosive charge off the ship's stern, detonate it, and note the time the sound arrived at the ship using a chronograph. Hydrophones installed at known positions would also detect the sound when it arrived at their locations and then automatically send a radio signal to the ship at the instant they detected the sound, recording that time with the ship's chronograph as well. The essentially instantaneous notification of the ship that the sound had arrived at a given set of hydrophones would allow the ship's crew to calculate the distance of their ship from the hydrophones by calculating the difference between the time the ship heard the explosion and the time the sound of the detonation arrived at the distant hydrophones and then multiplying this time by the speed of sound through water. By making these calculations for hydrophones at at least two different known locations, the ship's crew could use triangulation to fix their ship's position.[7][8]
Heck oversaw tests at Coast and Geodetic Survey headquarters in Washington, D.C., that demonstrated that shipboard recording of the time of an explosion could be performed accurately enough for his concept to work.
The cruise of the Guide
In late November 1923, with Heck aboard, Guide began a voyage via
Upon arrival in California, Heck and Guide personnel in consultation with the Scripps Institution developed formulas that allowed accurate echo sounding of depths in all but the shallowest waters and installed hydrophones at La Jolla and Oceanside, California, to allow experimentation with radio acoustic ranging.[7] Under Heck's direction, Guide then conducted experiments off the coast of California during the early months of 1924 that demonstrated that accurate echo sounding was possible utilizing the new formulas. Experiments with radio acoustic ranging, despite initial difficulties, demonstrated that the method was practical, although difficulty with getting some of the explosive charges to detonate hampered some of the experimental program.[7] In April 1924, the Coast and Geodetic Survey concluded that both echo sounding and radio acoustic ranging were fundamentally sound, with no foundational problems left to solve, and that all that remained necessary was continued development and refinement of both techniques during their operational use. Heck turned over continued development of echo sounding and radio acoustic ranging to Guide's commanding officer, Commander Robert Luce, and returned to his duties in Washington, D.C.[7]
The first non-visual method of navigation in human history, and the first that could be used at any time of day or night and in any weather conditions, radio acoustic ranging was a major step forward in the development of modern navigation systems. Heck revolutionized oceanic surveying through the use of radio electronic ranging to establish ship locations, one of his major contributions to oceanography.[1][6][9][10] His work also helped to develop underwater sound velocity tables allowing the establishment of "true depths" of up to five miles (8.0 km) using echo sounding,[1] and by 1928 all Coast and Geodetic Survey ships joined Guide in having a deep-water sounding capability.[9][10]
Seismology
Heck served as Chief of the Coast and Geodetic Survey's Division of Seismology and Terrestrial Magnetism[2] and was a leader in the development of geophysics,[2] a field in which he had a broad range of interests.[1] He made major contributions to seismology in his research on the energy consumed in the production of earthquakes,[1] and he identified the foci of earthquake activity in mountain, coastal, and undersea areas.[11] In the 1930s, he drew attention to a correlation between earthquake epicenters and the Mid-Atlantic Ridge,[2] first publishing a world seismicity map showing seismic activity there in 1932.[12][13]
Other duties
During his career, Heck served as the commanding officer of the five of the largest survey ships in the Coast and Geodetic Survey's fleet. Heck's final position was Scientific Assistant to the Director of the Coast and Geodetic Survey,[1] who at the time was Rear Admiral Leo Otis Colbert. Heck retired with the rank of captain on 30 April 1945.[1]
Awards
Lehigh University awarded Heck an honorary
The American Geophysical Union awarded Heck its William Bowie Medal[1] in 1942.
Personal and professional life
Heck was president of the American Geophysical Union from 1932 to 1935 and of the Seismological Society of America from 1937 to 1939. He also served as president of the Seismological Association of the International Union of Geodesy and Geophysics, the Philosophical Society of Washington and the Washington, D.C., chapter of the Society of Sigma Xi.[1] Heck also was a member or fellow of the Washington Academy of Science, the American Association for the Advancement of Science, the American Society of Civil Engineers, the Society of American Military Engineers, the American Geophysical Union, the Geological Society of America, the National Geographic Society, the Cosmos Club, and the Federal Club.[1]
Heck often returned to Lehigh University to lecture on a variety of topics, and he frequently contributed to the Lehigh Alumni Bulletin.
Heck never married.[1]
Death
Heck died at
Commemoration
The Coast and Geodetic Survey
References
- ^ a b c d e f g h i j k l m n o p q r s t u v NOAA History: Profiles in Time – C&GS Biographies: Nicholas Hunter Heck
- ^ a b c d e f g NOAA History: Coast & Geodetic Survey Ships: Heck
- ^ celebrating200years.noaa.gov NOAA 200th Top Tens: Breakthroughs: Hydrographic Survey Techniques: Wire-Drag Survey Technique, 2007
- ^ a b c d NOAA History: A Nation at War: World War I Military Records of Coast & Geodetic Survey Personnel: Nicholas H. Heck, Lieutenant Commander, U.S.N.R.F.
- ^ a b c d hydro-international.com System Without Fixed Points: Development of the Radio-Acoustic Ranging Navigation Technique (Part 1)
- ^ a b c d e f hydro-international.com The Discovery of Long-Distance Sound Transmission in the Ocean
- ^ a b c d e f g h i j k l m n o NOAA History: The Start of the Acoustic Work of the Coast and Geodetic Survey
- ^ a b Anonymous, "Ocean's Depth Measured By Radio Robot," Popular Mechanics, December 1938, pp. 828–830.
- ^ a b NOAA Ocean Explorer: Timeline
- ^ a b NOAA Ocean Explorer: Age of Electronics
- ^ The Free Dictionary: Heck, Nicholas H.
- ISBN 978-0-444-51817-0, pp. 16–17.
- ^ NOAA Ocean Explorer: Distribution of Earthquakes" map, 1936
- ^ geoscienceworld.org Bulletin of the Seismological Society of America: Earthquakes by Nicholas Hunter Heck (Princeton University Press, 1936; xi +22 pp. 88 figs.)
- ^ Burial Detail: Heck, Nicholas H (Section 3, Grave 6375 – at ANC Explorer
External links
- Nicholas Hunter Heck at ArlingtonCemetery.net, an unofficial website