Quantcast Visibility of Lights - 14221_106

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Characteristics of Lighted Aids to Navigation, Continued - 14221_105
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Quartermaster 3 & 2 - Military manual for the Quartermaster rate
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Visibility of Lights, Continued - 14221_107
Visibility of Lights Information The  visibility  of  a  lighted  ATON  depends  upon  two  factors:  the  light’s intensity  and  the  light’s  height  above  water.  There  will  be  times  when you  will  want  to  know  the  specific  distance  at  which  you  will  be  able  to see  a  light,  such  as  approaching  land  from  sea.  This  information  can  be helpful  in  determining  the  ship’s  position. Rule:    When a ship is under way all navigational lights that will be sighted  during  periods  of  darkness  must  be  identified  in  the  Captain’s Night  Orders.  It  is  desirable  to  also  define  the  time  at  which  the  light should be sighted. Process Refer  to  the  following  table  to  view  the  process  of  determining  the visibility of a light. Step Action Result 1. Locate  the  light  on  the  chart Information  gained  for and  note  the  name  of  the  light. obtaining  LLNR  from  the Light List. 2. 3. Extract  the  characteristics  from  Height  of  eye  computation  can the Light List. now be done. Compute  the  distance  at  which  Information  concerning  when  a the  light  should  be  sighted light  should  be  sighted  is from  the  height  of  eye  table. obtained. Table  4-3.  Height  of  Eye 4-8

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