Question 703Navigation General

The correct answer is B) Ship's speed. The ship's speed does not contribute to the commercial GPS receiver position error. The primary sources of GPS position error are: satellite orbit errors, atmospheric/ionospheric propagation delays, and satellite clock errors. The receiver's speed, however, does not affect the accuracy of the GPS position calculation. The other answer choices - satellite orbits, atmospheric/ionospheric propagation, and satellite clock errors - are all recognized factors that can introduce errors into the GPS position solution, but the ship's speed is not one of them.