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【法规名称】 
【法规编号】 61446  什么是编号?
【正  文】

第6页 CAP 369AJ MERCHANT SHIPPING (SAFETY) (NAVIGATIONAL EQUIPMENT) REGULATIONS

[接上页]

  Provided that such radio antennas which do not cause significant errors in the accuracy of the bearings obtained by the direction-finder installation need not be isolated.
  
  (2) Any ship fitted on or after 25 May 1980 with a direction-finder installation shall be provided with a communal antenna system for all broadcast receivers in respect of which it is impracticable to erect efficient and properly installed antennas which-
  
  (a) are outside a radius of 17 metres from the direction-finder antennas; or
  
  (b) do not rise above the base of the direction-finder antennas; or
  
  (c) can be lowered quickly and stowed easily when the direction-finder is in use.
  
  (Enacted 1991)
  
  Cap 369AJ reg 33 Siting of direction-finder installation
  
  (1) The direction-finder shall be so sited that efficient determination of radio bearings by means of the direction-finder will not be affected by extraneous noises.
  
  (2) (a) The direction-finder antenna system shall be mounted in such a manner that the efficient determination of radio bearings by means of the direction-finder will be affected as little as possible by the proximity of antennas, derricks, wire halyards and other large metal objects.
  
  (b) Adequate precautions shall be taken to protect the cables connecting the direction-finder antenna system with the receiver forming part of the direction-finder installation from the ingress of water and from damage, including any which might be caused by excess heat.(3) The direction-finder installation shall, where practicable, be mounted so as to prevent the performance and reliability of the installation being adversely affected by vibration and so that the installation will not, whilst in service, normally be subject to greater vibration than that specified in the relevant performance specification for the climatic and durability testing of maritime radio equipment.
  
  (Enacted 1991)
  
  Cap 369AJ reg 34 Means of communication
  
  (1) In every ship required to be fitted with a direction-finder installation an efficient two-way means of calling and voice communication shall be provided between the receiver forming part of the direction-finder and the position from which the ship is normally navigated.
  
  (2) In every such ship an efficient means of signalling shall be provided for use when calibrating or taking check bearings of the direction-finder installation between the receiver forming part of the direction-finder installation and the place on the ship from which visual bearings are taken.
  
  (3) If the direction-finder installation is not installed in the ship's radiotelegraph operating room, and radio antennas on the ship are required by regulation 32(1) to be isolated, means shall be provided at the direction-finder operating position to indicate when such antennas are isolated.
  
  (Enacted 1991)
  
  Cap 369AJ reg 35 Calibration
  
  (1) The master of every ship required to be fitted with a direction-finder installation shall cause the direction-finder installation to be calibrated in accordance with this regulation as soon as practicable after it has been installed in the ship and whenever any change is made in the position of the direction-finder antenna system.
  
  (2) (a) The direction-finder installation shall be calibrated by two persons, one being experienced in the taking of radio bearings and the other experienced in the taking of visual bearings. The calibration shall be carried out by taking simultaneous radio and visual bearings of a transmitter, and such bearings shall be taken at intervals of not greater than 5 degrees throughout 360 degrees on a frequency between 283.5 kHz and 315 kHz.
  
  (b) Calibration tables and curves, which enable radio bearings obtained by the direction-finder installation to be adjusted to within 2 degrees of the correct bearing, shall be prepared on the basis of the bearings taken in accordance with paragraph (a).
  
  (c) Following satisfactory calibration and the preparation of calibration tables and curves, a Certificate of Calibration of Direction-Finder shall be completed in the form specified in Schedule 1.
  
  (d) On each occasion that an arrangement of cargo carried above deck level varies significantly from an arrangement in respect of which the direction-finder installation has been calibrated, check bearings shall be taken, if practicable, to determine whether any substantial inaccuracy in the direction-finder installation is being caused by the arrangement of cargo. Where substantial errors are found, further check bearings shall be taken to establish a correction curve.(3) The master of every such ship shall cause the calibration tables and curves prepared in accordance with the foregoing provisions of this regulation to be verified by means of not less than four check bearings in each quadrant-
  
  (a) at intervals not exceeding 12 months; and
  
  (b) whenever any change is made in any structure or fitting on deck or in any rigging or antenna above deck which is likely to affect the accuracy of the direction-finder.If such verification shall show that the calibration tables or curves are substantially inaccurate, the master of the ship shall cause the direction-finder to be recalibrated as soon as practicable in the manner specified in subregulations (2) and (3).
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