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Chapter 1
Getting Ready
1-5 Measuring function for the device
This device receives a signal from the GPS, and measures distance and pace.
To make sure measurements are performed accurately, try to use the device under the
following conditions which allow for easy reception of GPS signals.
• Outside with no obstructions overhead
• The device is on the outside of your wrist
You cannot receive a signal from the GPS in the following environments.
Obstructed environments
Inside rooms or buildings, or
underground
In tunnels
Under water
Partially obstructed environments
Environments with high levels
of electronic interference,
such as constructions sites and
heavy traffic
Near high-voltage wires or
television towers, overhead
electric wires for trains, roads
with skyscrapers
On water
