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"The discussions above make it clear that the Global Positioning System provides the most accurate positions available to navigators today. They should also make clear that the most accurate positioning information is available to only a small fraction of the using population: U.S. and allied military. For most open OCEAN navigation applications, the degraded accuracy inherent in selective
availability and the inability to copy the precision code
presents no serious hazard to navigation. A mariner seldom
if ever needs greater than 100 meter accuracy in the middle
of the OCEAN."
CHAPTER 11. SATELLITE NAVIGATION
BOWDITCH
THE AMERICAN PRACTICAL NAVIGATOR
availability and the inability to copy the precision code
presents no serious hazard to navigation. A mariner seldom
if ever needs greater than 100 meter accuracy in the middle
of the OCEAN."
CHAPTER 11. SATELLITE NAVIGATION
BOWDITCH
THE AMERICAN PRACTICAL NAVIGATOR
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