NK
ClearNav
Manual
•
Version
0.5
•
July
3,
2008
Page
55
of
86
4.2.3.1
MacCready
Window
The
MacCready
Window
is
found
in
the
lower
left
corner
of
the
moving
map
screen
and
is
used
to
view
and
edit
the
MacCready
setting.
Please
refer
to
your
favorite
cross
‐
country
soaring
textbook
for
information
on
setting
this
number.
Briefly
‐
It
is
used
to
select
the
speed
‐
to
‐
fly
between
thermals.
It
is
often
set
to
the
best
estimate
of
the
average
climb
rate
in
the
next
thermal.
In
the
last
thermal
of
the
day
it
is
set
to
the
achieved
climb
rate
in
that
therma
To
edit
the
MacCready
setting
press
the
Focus
button
to
activate
the
NIA
and
use
the
Left
button
or
Right
button
to
highlight
the
MacCready
Window
.
Then
use
the
Up
and
Down
buttons
to
select
the
desired
setting.
MacCready
Set
Window
The
Up
and
Down
buttons
increment
and
decrement
the
MacCready
setting
in
0.5
knot
(or
0.2
m/s)
increments.
The
Zoom
In
(+)
and
Zoom
Out
(
‐
)
buttons
increment
and
decrement
the
MacCready
setting
in
1
knot
(or
0.6
m/s)
increments.
To
hide
the
MacCready
Set
Window
press
the
Select
,
Focus
or
Menu
button,
or
wait
and
it
will
hide
automatically
in
about
30
seconds.
4.2.3.2
Glide
Wind
Window
The
Glide
Wind
Window
is
found
in
the
lower
left
corner
of
the
moving
map
screen,
to
the
right
of
the
MacCready
Window
.
The
Glide
Wind
Window
is
used
to
view
or
edit
the
wind
speed
and
direction
that
are
used
by
the
software
for
final
glide
calculations.
We’ll
call
the
wind
used
for
final
glide
calculations
the
Glide
Wind
.
The
ClearNav
calculates
wind
speed
and
direction
automatically
using
GPS
data
and
measuring
wind
drift
while
circling.
The
ClearNav
can
also
receive
wind
data
from
an
external
device
such
as
a
Cambridge
302,
etc.
The
wind
data
provided
by
the
Cambridge
302
is
probably
more
accurate
because
it
is
calculated
using
airspeed
data
in
addition
to
the
GPS
data
–
which
makes
it
possible
to
measure
wind
while
cruising.
By
default,
the
ClearNav
automatically
puts
the
Measured
Wind
into
the
Glide
Wind
Window
.
That
method
works
well
in
many
soaring
locations
and
wind
conditions,
but
there
are
times
when
you
may
not
want
to
use
the
most
recent
measured
wind
for
the
Glide
Wind
.
An
example
of
that
would
be
when
you
are
about
to
head
into
a
very
different
airmass
–
such
as
when
gliding
down
into
a
valley
or
down
onto
a
ridge.
In
that
case
it
is
easy
to
manually
enter
the
Glide
Wind
.
Summary of Contents for ClearNav
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