EN ISO 449:1999
(Main)Ships and marine technology - Magnetic compasses, binnacles, and azimuth reading devices - Class A (ISO 449:1997)
Ships and marine technology - Magnetic compasses, binnacles, and azimuth reading devices - Class A (ISO 449:1997)
Covers a group of related two-part connectors for printed boards and cable connectors associated with printed backpanels. The group covers high-density connectors having up to 96 miniature contacts for low-voltage applications, connectors having up to 6 high current contacts, combined with up to 42 signal contacts and a range of 4, 10, 20 and 64 way female cable connectors and associated male parts for making connection to the backpanel or to the printed board.
Schiffe und Meerestechnik - Magnetkompasse, Kompaßstände und Peilvorrichtungen - Klasse A (ISO 449:1997)
Diese Internationale Norm beschreibt allgemeine Anforderungen an Konstruktion und Leistung von Magnetkompassen, Kompaßständen und Peilvorrichtungen der Klasse A. Abhängig von der Konstruktion des Schiffes werden zwei Arten von Kompaßständen beschrieben. Diese Internationale Norm gilt für Flüssigkeitsmagnetkompasse, die - für die Navigation auf See gemäß den geltenden Bestimmungen bestimmt sind, - ein System zur Direktablesung haben und, - das Reflexions-, Projektions oder Übertragungsprinzip anwenden können.
Navires et technologie maritime - Compas magnétiques, habitacles et alidades - Classe A (ISO 449:1997)
Traite d'un groupe de connecteurs enfichables pour circuits imprimés et de connecteurs de câble associés à des fonds de panier imprimés. Ce groupe comprend les connecteurs haute densité ayant jusqu'à 96 contacts miniatures pour les applications à basse tension, les connecteurs ayant jusqu'à six contacts courants forts combinés respectivement avec jusqu'à 42 contacts de signalisation, et une gamme de connecteurs de
câble femelles à 4, 10, 20 et 64 sens et les parties mâles correspondantes pour faire la connexion avec le fond de panier ou la carte de circuits imprimés.
Ships and marine technology - Magnetic compasses, binnacles, and azimuth reading devices - Class A (ISO 449:1997)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 449:2000
01-december-2000
Ships and marine technology - Magnetic compasses, binnacles, and azimuth
reading devices - Class A (ISO 449:1997)
Ships and marine technology - Magnetic compasses, binnacles, and azimuth reading
devices - Class A (ISO 449:1997)
Schiffe und Meerestechnik - Magnetkompasse, Kompaßstände und Peilvorrichtungen -
Klasse A (ISO 449:1997)
Navires et technologie maritime - Compas magnétiques, habitacles et alidades - Classe
A (ISO 449:1997)
Ta slovenski standard je istoveten z: EN ISO 449:1999
ICS:
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
SIST EN ISO 449:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 449:2000
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SIST EN ISO 449:2000
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SIST EN ISO 449:2000
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SIST EN ISO 449:2000
INTERNATIONAL ISO
STANDARD 449
Second edition
1997-06-15
Corrected and reprinted
1999-04-01
Ships and marine technology — Magnetic
compasses, binnacles and azimuth reading
devices — Class A
Navires et technologie maritime — Compas magnétiques, habitacles
et alidades — Classe A
A Reference number
ISO 449:1997(E)
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SIST EN ISO 449:2000
ISO 449:1997(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national standards bodies (ISO member bodies). The work of
preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which
a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 449 was prepared by Technical Committee
ISO/TC 8, Ships and marine technology, Subcommittee SC 6, Navigation.
This second edition cancels and replaces the first edition (ISO 449:1979),
which has been technically revised.
© ISO 1997
All rights reserved. Unless otherwise specified, no part of this publication may be
reproduced or utilized in any form or by any means, electronic or mechanical, including
photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
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SIST EN ISO 449:2000
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INTERNATIONAL STANDARD ISO ISO 449:1997(E)
Ships and marine technology — Magnetic compasses,
binnacles and azimuth reading devices — Class A
1 Scope
This International Standard gives general requirements regarding construction and performance for magnetic
compasses, binnacles and azimuth reading devices, class A. According to the design of the ship, two types of
binnacle are specified.
This International Standard applies to liquid-filled magnetic compasses:
— intended for sea navigation according to regulations in force;
— having a direct reading system;
— which may be of the reflecting, projecting or transmitting types.
In the context of this International Standard, a magnetic compass is an instrument consisting of a directional system
supported by a single pivot inside a bowl which is completely filled with liquid, and which is supported in gimbals
inside or outside the bowl. Compasses without gimbals are also covered by this International Standard. The
requirements relating to gimbals do not apply to such compasses.
This International Standard 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.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
ISO 613:1982, Shipbuilding — Magnetic compasses, binnacles and azimuth reading devices — Class B.
ISO/R 694:1968, Positioning of magnetic compasses in ships.
ISO 1069:1973, Magnetic compasses and binnacles for sea navigation — Vocabulary.
ISO 2269:1992, Shipbuilding — Class A magnetic compasses, azimuth reading devices and binnacles — Tests and
certification.
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ISO 10316:1990, Shipbuilding — Class B magnetic compasses — Tests and certification.
IEC 945:1994, Marine navigational equipment — General requirements — Methods of testing and required test
results.
3 Definitions
For the purposes of this International Standard, the definitions given in ISO 1069 apply.
4 Marking
The following parts shall be marked with the information given and in the position shown in table 1.
Table 1 — Marking requirements
Position of manufacturer's name or other means
Part Position of serial number on the part
of type identification
Magnetic compass a) card a) card
b) verge ring b) verge ring
c) gimbal ring or rings
Binnacle Any convenient position Not required
Azimuth reading device On top of the base of the azimuth reading device On top of the base of the azimuth reading
device
NOTE — The type of liquid used, if other than alcohol, shall be indicated on the bowl in the vicinity of the filling plug.
5 Magnetic compasses
5.1 Construction and materials
5.1.1 The magnets used in the directional systems of magnetic compasses shall be of a suitable magnetic material
having a high remanence and coercivity of at least 18 kA/m. All other materials used in magnetic compasses, other
than transmitting compasses, shall be of non-magnetic material.
5.1.2 The distance between the lubber mark and the outer edge of the card shall be between 1,5 mm and 3,0 mm
for direct reading and reflecting types and between 0,5 mm and 1,5 mm for projecting compasses. The width of the
lubber mark shall not be greater than 0,5° of the graduation of the card. The lubber mark shall be of such design as
to allow the compass to be read from the steering position when the bowl is titled 10° in the case of a gimbal
compass or 30° in other cases.
5.1.3 When the verge ring and the seating for the azimuth reading device are both horizontal, the graduated edge
of the card, the lubber mark if a point, the pivot point and the outer gimbal axis shall lie within 1 mm of the horizontal
plane passing through the gimbal axis fixed to the bowl.
5.1.4 The gimbal axes shall be mutually perpendicular within a tolerance of 1°. The outer gimbal axis shall be in the
fore-and-aft direction of the ship.
5.1.5 The thickness of the top glass cover and of the bottom glass of the compass shall be not less than 4,5 mm, if
non-toughened, and not less than 3,0 mm, if toughened. These values apply also to the thickness of the top glass in
hemispherical compasses. If material other than glass is used, it shall be of equivalent strength.
Within the temperature range - 30 °C to + 60 °C
5.1.6
a) the compass shall operate satisfactorily;
b) the liquid in the compass bowl shall remain clear and free from bubbles and neither emulsify nor freeze;
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c) there shall be neither inward leakage of air nor outward leakage of liquid. No bubble shall form in a compass
unless it is specially provided to compensate for expansion;
NOTE — A bubble provided in a compass to compensate for expansion shall not inconvenience the functioning and
reading of the compass;
d) the internal paint shall not blister, crack or discolour appreciably;
e) the supporting force shall be such that the directional system always remains in contact with its pivot;
f) the material of the compass card shall not distort.
5.1.7 The compass bowl shall be balanced so that its verge ring or top glass cover settles in the horizontal plane to
within 2° when the gimbal ring is fixed in a horizontal position; this shall be so whether the azimuth reading device or
magnifying glass is in place or not.
5.2 Mounting
5.2.1 The bowl of the compass shall be mounted so that the verge ring remains horizontal when the binnacle is
tilted 40° in any direction and in such a manner that the compass cannot be dislodged under any conditions of sea
or weather.
The inner and outer gimbal bearings shall be of the same type.
In compasses in which no supporting gimbal is provided the freedom of the card shall be 30° in all directions.
5.2.2
5.3 Directional system
5.3.1 Moment of inertia
The moment of inertia of the directional system shall be approximately the same about all horizontal axes passing
through the point of support on the pivot jewel.
5.3.2 Suspension
The directional system shall be retained in position by suitable means and remain free when the bowl is tilted 10° in
any direction.
5.3.3 Magnetic moment
The magnetic moment of the magnets in the directional system shall not be less than the value given in figure 1.
5.3.4 Settling time
Following an initial deflection of the card of 90° from the magnetic meridian, the time taken to return finally to within
1° of the magnetic meridian, shall not exceed 57600 H at a temperature of 20 °C – 3 °C, where H is the
horizontal component of the magnetic flux density in microteslas (mT) at the place of testing.
5.3.5 Tilt of the directional system with regard to the vertical field
The directional system shall be so constructed, or balanced in such a way, that it does not incline more than 0,5°
from the horizontal plane when the vertical flux density is zero. The inclination shall not change by more than 3°
when the vertical flux density changes 100 mT.
5.3.6 Supporting force
The force exerted on the pivot bearing, in the liquid used, by the directional system shall be between 0,04 N and
0,1 N when the card diameter is 165 mm or less, and shall be between 0,04 N and 0,14 N when the card diameter is
larger than 165 mm.
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Figure 1 — Magnetic moments of liquid filled compasses (minimum requirements)
5.4 Graduation
5.4.1 Compass card
The compass card shall be graduated in 360 single degrees, starting from North in the clockwise direction as viewed
from above. Each tenth degree should be marked with the three corresponding numbers. North should also be
indicated by 000°. The cardinal points shall be indicated by the capital letters N, S, E and W; the intermediate points
may also be marked. Alternatively, the North point may be indicated by a suitable symbol.
5.4.2 Diameter of the cards
The diameter of the compass card for binnacles of the following types are:
— type A1, 165 mm , or more;
— type A2, 125 mm, or more.
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5.4.3 Readability by the helmsman
If a steering compass is provided for the helmsman, it shall be possible for a person with normal vision to read at a
distance of 1,4 m, in both daylight and artificial light, those graduations on the card which are contained within a
sector whose width is not less than 15° to each side of the lubber mark. The use of a magnifying glass is permitted.
For reflecting and projecting compasses, the lubber mark shall be visible and the 30° sector of the card shall be
readable by a person with normal vision at a distance of 1 m from the periscope tube.
5.4.4 Standard compass
If the standard compass is provided with a scale graduated in degrees for the measurement of bearings relative to
the ship's head, the scale shall be graduated in 360 degrees in a clockwise direction, zero, as seen through the
azimuth reading device, indicating the direction of the ship's head.
5.5 Accuracy
5.5.1 Constructional errors
5.5.1.1 The directional error shall not exceed 0,5° on any heading.
5.5.1.2 The fixed lubber error shall not exceed 0,5°.
5.5.2 Error due to friction
With the compass at a temperature of 20 °C – 3 °C, the card, when given an initial deflection of 2°, first one side of
the magnetic meridian and then on the other, shall return to within (3/H)° of its original position, H being as defined
in 5.3.4.
5.5.3 Swirl error
With the compass at a temperature of 20 °C – 3 °C, and rotating at a uniform speed of 1,5° per second, the
deflection of the card, measured after the bowl has been rotated through 360° and the motion of the card has
ceased, shall at no point exceed the following values:
a) (54/H)° for compasses with cards 200 mm or more in diameter;
b) (36/H)° for compasses with cards less than 200 mm in diameter;
H being defined as in 5.3.4.
5.5.4 Induction error
To avoid the induction error which is caused by an inadequate arrangement of magnetic elements in the directional
system and introduced by magnetic induction in correctors (iro
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