Navigation 183
Further Information
NOTE
• Because the GPS satellite is in orbit around the earth, the reception status for
the electromagnetic waves changes depending on their position at that point
in time, even if your vehicle is in the same place. Also, electromagnetic-waves
from satellites near the horizon can be easily influenced by surrounding
obstacles.
• At times, satellites under the control of the US Department of Defence will
intentionally drop positioning accuracy.
Regarding Errors in Current Position Display
To pinpoint the current position, the unit uses information from GPS
satellite electromagnetic waves. If any of these contain errors, the
current position may not match the actual position.
• In underground buildings and indoor
parking lots
• In places with a lot of overgrown
trees and so on
• Under elevated roads • Roads at the base of cliffs and caves
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