include ($_SERVER[DOCUMENT_ROOT]."jnorth/www/includes/eg_nav2.inc"); ?>
Migration Day 16
Turn Them Back
LaSalle County, IL. OM
took off, but turned back when meeting with headwinds
of 19 mph. In such strong headwinds, it would have taken two hours and
47 minutes to cover the distance from this stop to the next planned stop.
They'll stay another night in LaSalle County, and hope for calmer air
aloft tomorrow. Distance traveled so far remains at 192.1 statute
How do the
pilots know it would take two hours and 47 minutes? They rely on their
GPS receivers. In this
audio clip, Joe tells how the
GPS helps the pilots, who need to keep both hands on the control bar
to steer. Here's more about GPS and how it helps the pilots leading
This! Journaling Question
the GPS receiver show the plane's ground speed or air speed? Why? (Hint:
See our lesson on GPS.)
Journey North is pleased to feature this educational
adventure made possible by the
Whooping Crane Eastern Partnership (WCEP).
2003-2004 Journey North. All Rights Reserved.
Please send all questions, comments, and suggestions to our feedback form