## Emergency Celestial NavigationIncreasing reliance on complex electronic navigation systems - nowadays generally available on pleasure yachts - has changed the perspective of emergency navigation. Today, it is more likely that a navigator will suffer failure of electronic devices or the associated power supply and be left with little more than a sextant to navigate with, than that he will be forced to navigate a lifeboat. In the event of failure or destruction of electronic systems, navigational equipment and methods may need to be improvised. ## Almanac DataOnly the declination of the Sun can be accurately enough detemined to be usefull. It is a Sine function between the two dates of solstice and with an amplitude of 23.4 degrees. This can be evaluated on a piece of paper and the protractor from the basic navigation plotting tools. ## Graphical Method for Sight Reduction
Without appropriate Sight-Reduction Tables and electronic calculator it is still
possible to obtain a relative accurate result for the Sight-Reduction calculation
with the following graphical method. |

Cover << Sail Away << Celestial Navigation << Special Techniques << . | last updated: 10-Jan-2013 |