Merchant Shipping Act, 1951 (Act No. 57 of 1951)RegulationsMerchant Shipping (Collision and Distress Signals) Regulations, 2005Annex I : Positioning and Technical Details of Lights and Shapes9. Horizontal sectors |
| (a) |
| (i) | In the forward direction, sidelights as fitted on the vessel shall show the minimum required intensities. The intensities shall decrease to reach practical cut-off between 1 degree and 3 degrees outside the prescribed sectors. |
| (ii) | For sternlights and masthead lights and at 22,5 degrees abaft the beam for sidelights, the minimum required intensities shall be maintained over the arc of the horizon up to 5 degrees within the limits of the sectors prescribed in Rule 21. From 5 degrees within the prescribed sectors the intensity may decrease by 50 per cent up to the prescribed limits, it shall decrease steadily to reach practical cut-off at not more than 5 degrees outside the prescribed sectors. |
| (b) |
| (i) | All-round lights shall be so located as not to be obscured by masts, topmasts or structures within angular sectors of more than 6 degrees, except anchor lights prescribed in Rule 30, which need not be placed at an impracticable height above the hull. |
| (ii) | If it is impracticable to comply with paragraph (b)(i) of this section by exhibiting only one all-round light, two all-round lights shall be used suitably positioned or screened so that they appear, as far as practicable, as one light at a distance of one mile. |