SUUNTO AMBIT - Manual (Page 87)

13 FUSEDSPEED
FusedSpeed
TM
is a unique combination of GPS and wrist acceleration sensor
readings for measuring your running speed more accurately. GPS signal is
adaptively filtered based on wrist acceleration, giving more accurate readings
at steady running speeds and a quicker response to changes in speed.
FusedSpeed
TM
will benefit you the most when you need highly reactive speed
readings during training, for example, when running on uneven terrain or
during interval training. If you temporarily lose GPS signal, for example, because
buildings block the signal, Suunto Ambit is able to continue showing accurate
speed readings with the help of the GPS calibrated accelometer.
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