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4 GENERAL REQUIREMENTS
4.1 INTRODUCTION
4.1.1 Equipment required by the Navigating Appliances and
Equipment Regulations, shall comply with the following general
requirements in accordance with section 5 of the Regulations.
4.1.2 Other standards are included in this document where there is
a requirement in other regulations or IMO resolutions.. (e.g. The requirement
in the Ships’ Deck Watch Regulations to carry an Automatic Pilot).
4.2 OPERATION ^
4.2.1 All controls shall be of such size and location as to permit
normal adjustments to be easily performed and shall be easy to identify.
4.2.2 Fully adequate illumination shall be provided to enable
identification of controls and facilitate reading of displays at all
times. Facilities for dimming shall be provided.
4.3 POWER SUPPLY ^
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4.3.1 Equipment shall continue to operate in accordance-with the
requirements of the relevant standards in the presence of variations of
the power supply normally to be expected in a vessel.
4.3.2 Means shall be incorporated for the protection of equipment
from excessive currents and voltages, transients and accidental reversal
of the power supply polarity.
4.3.3 If provision is made for operating equipment from more than a
one source of electrical energy, arrangements for rapidly changing from
one source of supply to the other shall be incorporated.
4.4 DURABILITY AND RESISTANCE TO ENVIRONMENTAL CONDITIONS
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4.4.1 Equipment shall be capable of continuous operation under the
conditions of sea states, vibration, humidity and change of temperature
likely to be experienced in the vessel in which it is installed.
4.5 INTERFERENCE ^
4.5.1 All reasonable and practicable steps shall be taken to
eliminate the causes of, and to suppress, electromagnetic interference
between the equipment concerned and other equipment on board.
4.5.2 Mechanical noise from all units shall be so limited as not to
prejudice the hearing of sounds on which the safety of the ship might
depend.
4.5.3 Each unit of equipment normally to be installed in the vicinity
of a standard or a steering magnetic compass shall be clearly marked
with the minimum safe distances at which it may be mounted from such
compasses.
4.6 MISCELLANEOUS ^
4.6.1 Equipment shall be so constructed and installed that it is
readily accessible for inspection and maintenance purposes. As far as
practicable, access to dangerous voltages within equipment shall be
prevented.
4.6.2 Information shall be provided to enable competent members of a
ship's staff to operate and maintain equipment efficiently.
4.6.3 Equipment shall be provided with an external indication of
manufacture, type and/or number.
4.6.4 Equipment shall be installed in such a manner that it is
capable of meeting its recommended performance standards.
4.7 INTERNATIONAL STANDARD ^
4.7.1 The International Maritime Orqanization Resolution
"A.281(VIII) Recommendation on General Requirements for Electronic
Navigational Aids" is the adopted standard.
4.8 EFFECTIVE DATE ^
4.8.1 This Standard comes into force on 1 September 1985.
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