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Extra resources for MCA Survey of Lights and Signaling Equipment

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Vessels 20m or more in length. 1 2. Masthead light (Aft) Rule 23. Vessels 20m or more in length. 0; March 2013 PAGE 30 (f) Vertical separation of ANNEX I, masthead lights from 1000 m 2(b); ahead Appendix F To calculate X (min) X (min) Hf C × Hf = ∴ X (min) = metres C A + 1000 A + 1000 ) metres (ii) X (actual ) = F − D = ( (i) Actual vertical separation must be greater than X min + 450mm 3. 1 PAGE 31 4. Stern light Rule 21(c), 23. 3 practicable for Rig Supply Vessels, tugs etc) (c) Duplication 5.

E. cutoff abaft the beam, is achieved by the lantern housing. The screen is to be painted matt black to minimise unwanted light. 0; March 2013 PAGE 39 SCREENING OF MASTHEAD LIGHTS Figure 4 A direct line from the centre of the lamp filament just touching the upper edge of the lantern platform should pass at least 1600mm (5'3") clear of the extremities of the bridge wings (figs. 4(a) & 4(b)) and of the look-out post at the fo'c'sle head (fig. 4(b)). Surveyors need not insist on this screening they are satisfied that the light is fitted sufficiently far from the look-out position for dazzle to present no problems, for example a light on the after mast of a long vessel will not normally dazzle a look-out on the fo'c'sle head.

Masthead light (For'd) Rule 23. Vessels 20m or more in length. 1 2. Masthead light (Aft) Rule 23. Vessels 20m or more in length. 0; March 2013 PAGE 30 (f) Vertical separation of ANNEX I, masthead lights from 1000 m 2(b); ahead Appendix F To calculate X (min) X (min) Hf C × Hf = ∴ X (min) = metres C A + 1000 A + 1000 ) metres (ii) X (actual ) = F − D = ( (i) Actual vertical separation must be greater than X min + 450mm 3. 1 PAGE 31 4. Stern light Rule 21(c), 23. 3 practicable for Rig Supply Vessels, tugs etc) (c) Duplication 5.

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