DGPS is accurate to within how many meters?

Prepare for the Boatswain’s Mate Chief (BMC) SWE Exam with in-depth study materials and multiple-choice questions. Enhance your understanding with well-explained hints and explanations. Ready yourself to excel!

Multiple Choice

DGPS is accurate to within how many meters?

Explanation:
DGPS improves GPS position accuracy by applying differential corrections from fixed reference stations. These stations know their exact location and compare the GPS measurements to that known position, then broadcast the difference to nearby receivers. When a receiver applies those corrections, most of the common errors—like satellite clock errors, orbit inaccuracies, and atmospheric delays—are canceled out, giving a much more precise fix. With these corrections, the horizontal accuracy of a DGPS-equipped navigator is typically around 10 meters. The other options describe distances far larger or not aligned with DGPS performance (for example, about 1,852 meters for a nautical mile, or 1,828 meters for 2000 yards, or 100 meters), which don’t reflect how accurate DGPS usually is.

DGPS improves GPS position accuracy by applying differential corrections from fixed reference stations. These stations know their exact location and compare the GPS measurements to that known position, then broadcast the difference to nearby receivers. When a receiver applies those corrections, most of the common errors—like satellite clock errors, orbit inaccuracies, and atmospheric delays—are canceled out, giving a much more precise fix.

With these corrections, the horizontal accuracy of a DGPS-equipped navigator is typically around 10 meters. The other options describe distances far larger or not aligned with DGPS performance (for example, about 1,852 meters for a nautical mile, or 1,828 meters for 2000 yards, or 100 meters), which don’t reflect how accurate DGPS usually is.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy