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THE COMPLETE NAUTICAL DICTIONARY
Originally by Nathanial Bowditch LL.D.
Upgraded for 2011 by National Geospatial-Intelligence Agency USA.
Photos & drawings by A.Phillips.
This is the ultimate complete nautical dictionary available in the world today.
The absolute best. 600 pages. 10,000 entries.
all-weather. , adj. Designed or equipped to perform by day or night under any weather conditions.
almanac. , n. A periodical publication of ephemeral astronomical data. If information is given in a form and to a precision suitable for marine navigation, it is called a nautical almanac. See also nautical almanac; if designed primarily for air navigation, it is called an air almanac. See also EPHEMERIS, ASTRONOMICAL ALMANAC.
almucantar. , n. A small circle on the celestial sphere paralleled to the horizon. Also called CIRCLE OF EQUAL ALTITUDE, PARALLEL OF ALTITUDE.
almucantar staff. . An ancient instrument formerly used for amplitude observations.
alnico. , n. An alloy composed principally of aluminum, nickel, cobalt, and iron; used for permanent magnets.
aloft. . Up in the rigging of a ship.
alongshore current. . See LONGSHORE CURRENT.
alphanumeric. . Referring to a set of computer characters consisting of alphabetic and numeric symbols.
alphanumeric grid. . See ATLAS GRID.
alternate blanking. . See under DUAL-RATE BLANKING.
alternating current. . An electric current that continually changes in magnitude and periodically reverses polarity.
alternating. . Referring to periodic changes in color of a lighted aid to navigation.
alternating fixed and flashing light. . A fixed light varied at regular intervals by a single flash of greater luminous intensity, with color variations in either the fixed light or flash, or both. See ALTERNATING LIGHT.
alternating fixed and group flashing light. . A fixed light varied at regular intervals by a group of two or more flashes of greater luminous intensity, with color variations in either the fixed light or flashes or both.
alternating flashing light. . A light showing a single flash with color variations at regular intervals, the duration of light being shorter than that of darkness. See also FLASHING LIGHT.
alternating group flashing light. . A group flashing light which shows periodic color change.
alternating group occulting light. . A group occulting light which shows periodic color change.
alternating occulting light. . A light totally eclipsed at regular intervals, the duration of light always being longer than the duration of darkness, which shows periodic color change. See also ALTERNATING LIGHT.
alternating light. . A light showing
model atmosphere. Any theoretical representation of the atmosphere, particularly of vertical temperature distribution. See also STANDARD ATMOSPHERE.
modem. An electronic device which converts digital information to analog signals and vice-versa, used in computer file transfer over telephone lines; derived from MOdulator-DEModulator.
moderate breeze. Wind of force 4 (11 to 16 knots or 13 to 18 miles per hour) on the Beaufort wind scale.
moderate gale. A term once used by seamen for what is now called NEAR GALE on the Beaufort wind scale.
modification, n. An instrument design resulting from a minor change, and indicated by number. A design resulting from a major change is called a MARK.
modified Julian day. An abbreviated form of the Julian day which requires fewer digits and translates the beginning of each day from Greenwich noon to Greenwich midnight; obtained by subtracting 2400000.5 from Julian days.
modified Lambert conformal chart. A chart on the modified Lambert conformal map projection. Also called NEY’S CHART.
modified Lambert conformal map projection.
Upgraded for 2011 by National Geospatial-Intelligence Agency USA.
Photos & drawings by A.Phillips.
This is the ultimate complete nautical dictionary available in the world today.
The absolute best. 600 pages. 10,000 entries.
all-weather. , adj. Designed or equipped to perform by day or night under any weather conditions.
almanac. , n. A periodical publication of ephemeral astronomical data. If information is given in a form and to a precision suitable for marine navigation, it is called a nautical almanac. See also nautical almanac; if designed primarily for air navigation, it is called an air almanac. See also EPHEMERIS, ASTRONOMICAL ALMANAC.
almucantar. , n. A small circle on the celestial sphere paralleled to the horizon. Also called CIRCLE OF EQUAL ALTITUDE, PARALLEL OF ALTITUDE.
almucantar staff. . An ancient instrument formerly used for amplitude observations.
alnico. , n. An alloy composed principally of aluminum, nickel, cobalt, and iron; used for permanent magnets.
aloft. . Up in the rigging of a ship.
alongshore current. . See LONGSHORE CURRENT.
alphanumeric. . Referring to a set of computer characters consisting of alphabetic and numeric symbols.
alphanumeric grid. . See ATLAS GRID.
alternate blanking. . See under DUAL-RATE BLANKING.
alternating current. . An electric current that continually changes in magnitude and periodically reverses polarity.
alternating. . Referring to periodic changes in color of a lighted aid to navigation.
alternating fixed and flashing light. . A fixed light varied at regular intervals by a single flash of greater luminous intensity, with color variations in either the fixed light or flash, or both. See ALTERNATING LIGHT.
alternating fixed and group flashing light. . A fixed light varied at regular intervals by a group of two or more flashes of greater luminous intensity, with color variations in either the fixed light or flashes or both.
alternating flashing light. . A light showing a single flash with color variations at regular intervals, the duration of light being shorter than that of darkness. See also FLASHING LIGHT.
alternating group flashing light. . A group flashing light which shows periodic color change.
alternating group occulting light. . A group occulting light which shows periodic color change.
alternating occulting light. . A light totally eclipsed at regular intervals, the duration of light always being longer than the duration of darkness, which shows periodic color change. See also ALTERNATING LIGHT.
alternating light. . A light showing
model atmosphere. Any theoretical representation of the atmosphere, particularly of vertical temperature distribution. See also STANDARD ATMOSPHERE.
modem. An electronic device which converts digital information to analog signals and vice-versa, used in computer file transfer over telephone lines; derived from MOdulator-DEModulator.
moderate breeze. Wind of force 4 (11 to 16 knots or 13 to 18 miles per hour) on the Beaufort wind scale.
moderate gale. A term once used by seamen for what is now called NEAR GALE on the Beaufort wind scale.
modification, n. An instrument design resulting from a minor change, and indicated by number. A design resulting from a major change is called a MARK.
modified Julian day. An abbreviated form of the Julian day which requires fewer digits and translates the beginning of each day from Greenwich noon to Greenwich midnight; obtained by subtracting 2400000.5 from Julian days.
modified Lambert conformal chart. A chart on the modified Lambert conformal map projection. Also called NEY’S CHART.
modified Lambert conformal map projection.
406 pages, Kindle Edition
First published August 10, 2010
About the author
Nathaniel Bowditch
122 books4 followersNathaniel Bowditch was an early American mathematician remembered for his work on ocean navigation. He is often credited as the founder of modern maritime navigation; his book The New American Practical Navigator, first published in 1802, is still carried on board every commissioned U.S. Naval vessel. In 2001, an elementary and middle school in Salem was named in his honor.
Father of:
Henry Ingersoll Bowditch
Nathaniel Ingersoll Bowditch
and grandfather of:
Henry Pickering Bowditch
Charles Pickering Bowditch
Father of:
Henry Ingersoll Bowditch
Nathaniel Ingersoll Bowditch
and grandfather of:
Henry Pickering Bowditch
Charles Pickering Bowditch
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