ISO 14227:2001 PDF

Small craft — Magnetic compasses

Название (английский):

ISO 14227:2001

Small craft — Magnetic compasses

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 13 декабря 2001 г.
Издание:: ISO IS 14227 edition 1 version 1
ICS:: 47.080

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Описание (английский):

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).

Технические детали

Технический комитет: ISO/TC 188 - Small craft
SKU: ISO 14227:2001

Abstract

Overview

ISO 14227:2001 - Small craft - Magnetic compasses - specifies general construction, performance and type-test requirements for liquid magnetic compasses used on small craft with hull length up to 24 m. The standard covers inspectable liquid compasses (direct-reading or reflecting/projecting types), including compasses not supported on gimbals. It explicitly excludes dry-card compasses and compass types based on different principles (for example transmitting compasses).

Key topics and technical requirements

Scope and marking
- Applies to liquid magnetic compasses for small craft (≤ 24 m).
- Required markings: manufacturer name, type/serial number, ISO 14227 reference, and liquid type if not alcohol.
Materials and construction
- Non-magnetic materials for housings; directional-system magnets must have high remanence/coercivity.
- Components must perform at normal reference temperature (+20 °C ± 3 °C).
Compass bowl and gimbals
- Bowl supported by gimbals with perpendicular axes ±1° and coplanarity ±1 mm; external gimbal axis aligned with craft longitudinal direction.
- Liquid must remain clear, bubble-free and not freeze or emulsify in −30 °C to +60 °C.
Directional system and pivot
- Pivot bearing of hard stone; pivot force and magnetic moment requirements defined (see standard for values).
- Pivot must remain free with specified tilt (10° for gimballed, 30° if not).
Card, graduations and visibility
- Minimum card diameter: 100 mm (65 mm for hemispherical); graduations ≤ 5°; readable at 1 m within ±15° of lubber mark.
Performance and accuracy
- Directional error ≤ 1.5°; lubber error ≤ 1.0° (for external gimbal axis); friction error ≤ 1°.
- Swirl error limits: ≤ 3.5° for card

Overview

Key topics and technical requirements

Scope and marking
- Applies to liquid magnetic compasses for small craft (≤ 24 m).
- Required markings: manufacturer name, type/serial number, ISO 14227 reference, and liquid type if not alcohol.
Materials and construction
- Non-magnetic materials for housings; directional-system magnets must have high remanence/coercivity.
- Components must perform at normal reference temperature (+20 °C ± 3 °C).
Compass bowl and gimbals
- Bowl supported by gimbals with perpendicular axes ±1° and coplanarity ±1 mm; external gimbal axis aligned with craft longitudinal direction.
- Liquid must remain clear, bubble-free and not freeze or emulsify in −30 °C to +60 °C.
Directional system and pivot
- Pivot bearing of hard stone; pivot force and magnetic moment requirements defined (see standard for values).
- Pivot must remain free with specified tilt (10° for gimballed, 30° if not).
Card, graduations and visibility
- Minimum card diameter: 100 mm (65 mm for hemispherical); graduations ≤ 5°; readable at 1 m within ±15° of lubber mark.
Performance and accuracy
- Directional error ≤ 1.5°; lubber error ≤ 1.0° (for external gimbal axis); friction error ≤ 1°.
- Swirl error limits: ≤ 3.5° for card

ISO 14227:2001 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

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