ISO 14227 pdf download

ISO 14227 pdf download.Small craft — Magnetic compasses 1 Scope This International Standard specifies the general requirements for the construction as well as the performance of type tests of magnetic compasses on board small craft of hull length up to 24 m. It refers to liquid magnetic compasses, which can be inspected (e.g. not sealed), either equipped with a direct reading system, or of the reflecting/projecting type. This International Standard also covers magnetic compasses (3.1) not supported on gimbals. The requirements relating to gimbals do not refer to such magnetic compasses. This International Standard does not cover – dry card compasses, or – types of compasses designed on principles different from those stated above or not complying with the description given in this clause (e.g. transmitting compasses). 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 1069:1973, Magnetic compasses and binnacles for sea navigation — Vocabulary IEC 60721-3-6:1987, Classification of environmental conditions. Part 3: Classification of groups of environmental parameters and their severities. Section 6: Ship environment IEC 60721-3-6, Amendment 1, 1991 IEC 60721-3-6, Amendment 2, 1996 3 Terms and definitions For the purposes of this International Standard, the terms and definitions of ISO 1069 and the following apply. 3.1 magnetic compass instrument consisting of a directional system supported on a pivot inside a bowl which is completely filled with liquid and which may be supported on gimbals 3.2 gimbals devices permitting movements regarding the longitudinal and transversal axes of the craft so as to allow the directional system to seek a horizontal position regardless of the motion of the craft 3.3 static stability of the card condition allowing the card to stay horizontally in its balance position 3.4 mechanical stability of the card condition permitting to reduce to a minimum the angular acceleration that the card can attain when under rolling, pitching or vibration 3.5 magnetic stability of the card condition permitting to call back the magnetic axis...