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Page Title: How to Determine the Time of Sunrise, and Sunset..., Continued
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How to Determine the Time of Sunrise, and Sunset..., Continued Example In our example, we will assume that at 1500 on 1 Sep 94 our training ship is located at 36° 14.0' N 069° 26' W, on course 090° T at a speed of 10 knots.  Problem:  find  the  time  of  sunset. OPNAV 3530/38 (4-73) SUNSET/RISE DR Lat Tab Interval Lat Interval Lat  Diff Corr Table I Tab LMT Corr LMT DR l STD Mer d l (arc) Step Action 1. From  the Nautical Almanac note the time of tab sunset for the latitude closest to your current position. 2. Enter the interval between the two latitudes closest to your DR Lat. 3. Enter the time difference between the two latitudes. 4. Enter the difference between your DR Lat. and the  lower tab latitude. 5. Go to Correction Table I in the Nautical  Alm.,  follow  the instructions at the bottom of the table  to  determine  the  time correction. 6. 7. 8. 9. 10. Enter  the  time  of  the  tabulated lat., use the tab lat that is lower than  your  DR  Lat. Add  the  time  correction. ‘Enter the DR Longitude. Enter the value for the time zone that the ship is keeping, in this case +5R express in degrees, 5 x 15 = 75. Find the lat difference between 75°  and  DR l 069°26'. Completed  Strip  Form DR Lat 36°  14'N Tab Interval Lat Interval 5 min Lat  Diff 1°14' Corr Table I 1 min Tab LMT 1826 Corr LMT 1827 DR l 069° 26' STD Mer 075° d l (arc) 5° 34' 6-8

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