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 Shapes10. Vertical sectors |
| (a) | The vertical sectors of electric lights as fitted, with the exception of lights on sailing vessels underway shall ensure that: |
| (i) | at least the required minimum intensity is maintained at all angles from 5 degrees above to 5 degrees below the horizontal; |
| (ii) | at least 60 per cent of the required minimum intensity is maintained from 7,5 degrees above to 7,5 degrees below the horizontal. |
| (b) | In the case of sailing vessels underway the vertical sectors of electric lights as fitted shall ensure that: |
| (i) | at least the required minimum intensity is maintained at all angles from 5 degrees above to 5 degrees below the horizontal; |
| (ii) | at least 50 per cent of the required minimum intensity is maintained from 25 degrees above to 25 degrees below the horizontal. |
| (c) | In the case of lights other than electric these specifications shall be met as closely as possible. |