ISO 25862:2019 船と海洋技術—海洋磁気コンパス、ビナクル、方位角読み取り装置 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee SC 6, Navigation and ship operations.

This second edition cancels and replaces the first edition (ISO 25862:2009), which has been technically revised.

The main changes compared to the previous edition are as follows:

• Clause 1: an overview of the annexes was added.
• Clause 2: moved IMO Resolution A. 382 (X) to the Bibliography.
• Clause 3: 3.4 and 3.5 were added.
• Clause 4: 4.1 was added. The temperature range of Class B magnetic compasses was changed to “−30 °C to +60 °C” (4.2.6). The magnetic moment of Class B magnetic compasses was added to Figure 1. Table 2 was updated (Equal interval of the graduation of Class B magnetic compasses was changed to “1°, 2°, 2,5° or 5°”. Card numbered of Class B magnetic compasses was changed to “Every 30° or every 10°”.) and 4.7 was updated.
• Clause 5: 5.1, 5.2.1, and 5.3.1 were added. 5.2.6 and 5.3.6 were updated.
• Clause 6: 6.1 was added.
• Annex D: D.2.4.1 and D.2.6.1 were added.
• Annex H: H.2.1 was added.
• Bibliography: IMO Resolution A. 382 (X) and EN 166 were added.

1 Scope

This document specifies requirements for the construction and performance of marine magnetic compasses for navigation and steering purposes, binnacles and azimuth reading devices.

Two types of binnacle are specified; the appropriate type for a given vessel is determined by the design of the ship (see Clause 5).

This document applies to liquid-filled magnetic compasses:

• intended for use in ship's navigation and steering in sea navigation;
• having a direct reading system; and
• which can be of the reflecting, projecting or transmitting types.

In the context of this document, a magnetic compass is an instrument consisting of a directional system supported by a single pivot inside a bowl that is completely filled with liquid and supported by gimbals inside or outside the bowl. However, this document also addresses compasses without gimbals; the requirements relating to gimbals do not apply to such compasses.

This document applies to magnetic compasses carried on board:

• a) all ships required to carry a standard compass as per SOLAS Chapter V, the Class A magnetic compass;
• b) lifeboats and rescue boats as per the IMO Lifesaving Appliances (LSA) Code, fitted with the Class B magnetic compass; and
• c) all ships to which a) and b) above do not apply, but which are fitted with a Class A or B magnetic compass.

This document does not apply to:

• a) dry card compasses;
• b) types of compass designed on principles different from those stated above or not complying with the descriptions given; or
• c) hand bearing compasses.

The requirements for the testing and certification of marine magnetic compasses, azimuth reading devices and binnacles are given in Annexes A, B, C, and D. The requirements for the positioning in ships, the determination of safe distances and the deviation adjustment of compasses are given in Annexes E, F and G, respectively. The special requirements of the magnetic compass for lifeboats/rescue boats are given in Annex H.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 1069 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography