## Elements of surveying and navigation: with descriptions of the instruments and the necessary tables |

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### Common terms and phrases

angle of elevation axis azimuth back-sights base line bearing called centre clamp-screw coincide column comp compass corresponding cosine cotangent course curve decimal degrees determined diff difference of latitude difference of level difference of longitude direction dist divided double meridian distance draw east elongation error example extremity feet field notes figure given line given point ground hence horizontal angle horizontal distance horizontal plane hypothenuse inches instrument intersection latitude and departure length line AC line of collimation logarithm marked measure method middle latitude miles multiplied needle paper parallel parallel sailing passing perpendicular plane of reference plane sailing protractor radius right angles sailing scale of equal secant ship side similar triangles spider's lines square chains staff subtract surface survey tance tangent theodolite Trigonometry true meridian vernier plate vertical limb yards