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Extract
One of the essential steps in the operations of war is to know where your enemy is, so that you may either make contact with him or avoid him: the same applies to any friendly force with which you may be operating. And in parallel with these steps you need also to establish your position relative to any natural hazards that you may have either to avoid or exploit. If you can establish the positions of yourself, your friends, the enemy, and the hazards relative to the Earth's surface, you can use the information to control your own movements as you wish; alternatively you can sometimes, by one means or another, directly establish the enemy's position relative to your own and proceed accordingly—a process equally useful in ‘homing’ or evasion.
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- The Duke Of Edinburgh Lecture
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- Copyright © The Royal Institute of Navigation 1975