ISO 19018:2020 pdf download

ISO 19018:2020 pdf download.Ships and marine technology — Terms, abbreviations, graphical symbols and concepts on navigation
1 Scope
This document provides terms, abbreviations and graphical symbols for use in maritime navigation on board ships. Symbols for use in mathematical formulae are also given, as applicable.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
Terms, abbreviation and symbols used in navigation are given in Clauses 4 to 16. Abbreviations can prove useful, but they should not be used in mathematical formulae.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1 navigation
process of finding the position of a craft or vehicle, and of planning, recording and controlling its movement from one place to another
6 Course, heading, track, speed
6.1 Course, heading
Course (CRS) and heading (HDG) are angles, measured in the horizontal plane from one of the reference directions specified in Clause 5, counted clockwise from 000° through <360°, written as three-digit numbers.
Direction of motion relative to ground or to sea, of a ship, expressed as an angular displacement from north. Direction in which the bow of a ship is pointing, expressed as an angular displacement from north [SOURCE: IM0 Resolution MSC.192(79], Appendix 2.] Direction of motion relative to ground or to sea, of a target, expressed as an angular displacement from true north. . [SOURCE: IM0 Resolution MSC.192(79], Appendix 2.] The direction in which the ship is intended to be steered, defined as an angular displacement from true course. Horizontal direction that the bow of a ship is pointing, expressed as an angular displacement from true north. Direction of motion relative to ground or to sea, of a ship, expressed as an angular displacement from magnetic north. Horizontal direction that the bow of a ship is pointing, expressed as an angular displacement from magnetic north.