pelorusn.

Brit.

/pᵻˈlɔːrəs/, U.S.

/pəˈlɔrəs/

Forms: also with capital initial.

Origin: From a proper name. Etymon: proper name Pelorus.

Etymology: < Pelorus, the name of Hannibal's pilot in some Roman texts.There has also been a succession of Royal Navy ships named Pelorus at least since the early 19th cent.

A compass-like sighting device, usually on a ship or aircraft, used for taking the relative bearings of a distant object, and consisting of a compass rose and one or two rotating sighting arms.

ΘΚΠ

society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > compass > types of

paradoxal compass1558

steering compass1669

variation compass1669

correcting compass1821

telltale1828

pelorus1854

liquid compass1865

gyroscope-compass1909

gyro-compass1910

radio compass1912

gyro1914

gyroscopic compass1920

inductor compass1922

gyro-pilot1923

induction compass1925

astrocompass1942

flux gate compass1946

1854 M. C. Friend & W. Browning Brit. Patent 2652 (1855) 3 This invention has for its object the construction and use of an instrument or apparatus which we denominate a pelorus, for determining the amount of magnetic aberration occasioned by local attraction in ships or vessels of every description.., and by the use of which..the true course..may be from time to time accurately ascertained.

1881 S. T. S. Lecky Wrinkles Pract. Navigation x. 67 Having a Pelorus, the first thing to do is to provide suitable stands for it in various parts of the ship, so that it may be moved from one to the other as may be found convenient.

1904 D. Wilson-Barker & W. Allingham Navigation (ed. 2) iii. 17 For the purpose of obtaining bearings when the object is not visible from the standard compass..a Pelorus is very useful.

1934 J. Irving Navigation Small Yachts 284 As the ship's head is steadied on a point by the steering compass the bearing of the distant object is noted by the ‘pelorus’, and this bearing angle (from right ahead) is applied to the compass direction of ship's head.

1988 Air Enthusiast Sept. 67/1 These two added windows were larger than normal and were optically flat, permitting the navigator to obtain accurate celestial observations with a sextant or pelorus shots of landmarks.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

单词	pelorus
释义	pelorusn. Brit. /pᵻˈlɔːrəs/, U.S. /pəˈlɔrəs/ Forms: also with capital initial. Origin: From a proper name. Etymon: proper name Pelorus. Etymology: < Pelorus, the name of Hannibal's pilot in some Roman texts.There has also been a succession of Royal Navy ships named Pelorus at least since the early 19th cent. A compass-like sighting device, usually on a ship or aircraft, used for taking the relative bearings of a distant object, and consisting of a compass rose and one or two rotating sighting arms. ΘΚΠ society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > compass > types of paradoxal compass1558 steering compass1669 variation compass1669 correcting compass1821 telltale1828 pelorus1854 liquid compass1865 gyroscope-compass1909 gyro-compass1910 radio compass1912 gyro1914 gyroscopic compass1920 inductor compass1922 gyro-pilot1923 induction compass1925 astrocompass1942 flux gate compass1946 1854 M. C. Friend & W. Browning Brit. Patent 2652 (1855) 3 This invention has for its object the construction and use of an instrument or apparatus which we denominate a pelorus, for determining the amount of magnetic aberration occasioned by local attraction in ships or vessels of every description.., and by the use of which..the true course..may be from time to time accurately ascertained. 1881 S. T. S. Lecky Wrinkles Pract. Navigation x. 67 Having a Pelorus, the first thing to do is to provide suitable stands for it in various parts of the ship, so that it may be moved from one to the other as may be found convenient. 1904 D. Wilson-Barker & W. Allingham Navigation (ed. 2) iii. 17 For the purpose of obtaining bearings when the object is not visible from the standard compass..a Pelorus is very useful. 1934 J. Irving Navigation Small Yachts 284 As the ship's head is steadied on a point by the steering compass the bearing of the distant object is noted by the ‘pelorus’, and this bearing angle (from right ahead) is applied to the compass direction of ship's head. 1988 Air Enthusiast Sept. 67/1 These two added windows were larger than normal and were optically flat, permitting the navigator to obtain accurate celestial observations with a sextant or pelorus shots of landmarks. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < n.1854
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