There are a few fields that I pay attention to on my Flytec 6030
when I get close enough to goal that I might be able to go on final glide or am
climbing in a thermal that might get me high enough to go on final glide. I have
a screen dedicated to these user-determined fields:

My true airspeed (mph) is shown in the upper right hand corner. I can set the
6030 to display indicated air speed or true air speed. I have chosen to display
true airspeed.

Flytec USA 6030 documentation:

Thanks to modern processor technology, the 6030 can calculate both
true and indicated air speed, regardless of which air speed input device
(propeller or pitot tube) is used. The pilot can set the type of speed he/she
would like to see in the display without affecting airspeed related
calculations. Therefore, if the pilot elects to display IAS, it should be no
surprise that at high altitudes with no wind, the ground speed displayed by the
GPS will be much higher than the indicated air speed, even though in reality
ground speed and air speed would be the same.

There is an analog speed scale on the right hand side with an
indicator of your best glide speed to the right side of it (see graphic below). 
As I have set the 6030 to display true airspeed, the analog speed scale to the
right and the best glide speed indicator will also display true air speed.

My Speed-to-Fly speed will be indicated by the McCready Indicator and the
Average Thermal Indicator (both not shown above) on the analog vario on the
upper left side. See below:

When the McCready indicator is touching the upper end of the Thermal Average
indicator then I am flying at my Speed-To-Fly speed as determined by McCready
theory and that speed is displayed in the digital airspeed field in the upper
right hand corner.

If I set the McCready Indicator at a different value than the Thermal Average
indicator highest value on the analog vario I'm making the assumption that the
next thermal will be different than the last thermal.

The value of my average climb rate (Int, which stands for integrated, which
stands for average) over 20 seconds (fpm) is 0.0 in the first graphic as I have
my Flytec 6030 sitting on my patio. I can set the time interval for the
calculation of the average airspeed.

My altitude is displayed just below the "Int" value. It is
the barometric/pressure altitude above mean sea level in feet. I set the  barometric/pressure
altitude at
launch to the GPS altitude of launch using the F2 function key as seen above.
The 6030 will automatically set the barometric/pressure altitude to the launch
GPS altitude without me having to press the F2 key once it gets a 3D fix and it
will continually update the altitude as it gets a better fix up until you take
off.

The Distance to Waypoint (Dist WP) value displays the long distance from Boise, Idaho to Quest
Air, Florida (in kilometers) in the first graphic. If the waypoint is the goal,
then it is very likely that the distance to the waypoint is very close to the
distance to the goal. The goal is likely to be a 400 meter cylinder, in which
case you would arrive at goal 400 meters before you would get to the goal
waypoint. At 10:1 that means you would be 40 meters (131 feet) higher than you
absolutely had to be if you were flying fast enough to get to goal with zero
feet of elevation above ground.

If the next waypoint has a large cylinder around it, this "Dist WP" will not be
as useful, but then this is the final glide page and we assume that you are
final gliding into goal, so we're not concerned about that. I use another screen
on the Flytec 6030 to display distance to cylinder or distance to optimized
waypoint on the cylinder.

The bottom six user-defined fields in the first graphic above are in two columns. The left column
contains altitude values and the right column contains L/D values.

The top variable in the left column is the component of the Wind Speed in mph (Wind
Comp). The
wind direction is right above it in the compass rose. The marker in the compass
rose is too small for me to see while flying. I've flown with the Volirium P1 in
addition to the Flytec 6030 and the P1 spells out the wind direction in large
letters so I can see it.

Flytec USA 6030 documentation:

It is necessary to fly at least two complete 360's as steadily as
possible before the 6030 can register and display wind speed and direction.

When flying to a waypoint – and, even more importantly, to a goal – the wind
component (the difference between ground speed and air speed over the track) is
very important. In most cases the wind does not blow directly from the front or
from behind, but from the side. If the wind component displayed in the
user-field Wind Comp is positive, then you will fly with a tail wind, and the
glide ratio over the ground will improve. If it is negative, the glide ratio
will worsen.

Below the Wind Comp value is the value of my projected altitude
above the goal assuming that I will fly at best glide speed
(A BG Goal). This relies on my polar to determine my sink rate at that air
speed. It assumes no rising or sinking air between me and the goal. If there is
a waypoint between me and goal it takes that into
consideration as part of the task.

A BG Goal is also my present altitude above my best glide line to goal.

My best glide speed is equal to my Speed-To-Fly speed assuming that my McCready
indicator is pointed at zero, i.e. as though that lift in the last thermal
averaged zero fpm or if the best glide indicator on the analog speed scale
displayed on the right matches you current airspeed.

Below my A BG Goal value is the value for my projected altitude above the next waypoint given my current
ground speed (Alt a WP). This relies on my polar to determine my sink rate at
my associated air speed. It assumes no rising or sinking air between me and the
turnpoint. We have to use this variable to stand for altitude above goal as there is no variable Alt a Goal.
Alt a WP doesn't give us the altitude above goal until the goal is the next
waypoint.

Flytec USA 6030 documentation:

The user-field Alt a WP displays your current altitude above (or
below) the McCready glide path to the next waypoint – or to goal if you are on
final glide. When the value of Alt a WP becomes positive, the user-field will
invert (white numbers on a black background), indicating that you have gained
sufficient altitude to fly to goal at the optimum McCready speed ring setting.

The user-field Alt a WP is the height above the optimum glide slope to the
waypoint. The data field will invert (white numbers on a black background) when
Alt a WP becomes positive. The calculated arrival height assumes that there is
neither lift nor sink along the flight path and that the wind remains constant.

Just as the 6030 knows the McCready optimized speed to fly for a next expected
climb rate based your gliders polar (as entered into the instrument), it
similarly knows the correct speed to fly to goal based on your final climb rate.
For each speed to fly there is an associated glide ratio. Using this glide
ratio, the distance and altitude of goal, the 6030 can determine the necessary
altitude you must attain in your last climb to arrive at goal by flying the
optimal speed. If there is a wind component, the 6030 can calculate your
resulting glide ratio and adjust the departure altitude.

As you climb in your final thermal, the 6030 compares the optimum (automatic or
manual wind-adjusted) departure altitude with your current altitude and displays
this value in the user-field Alt a WP. The displayed value will become
increasing less negative as you approach the optimal departure altitude (Alt a
WP = 0). When this occurs the user-field visually inverts (white numbers on a
black background) and it is now possible to leave the thermal and fly at the
optimum speed to goal. This assumes that lift and sink on final glide net zero.
Because there is no way for the 6030 to know otherwise – or to know if the wind
component will change – you must decide, based on an assessment of conditions,
whether to leave immediately when Alt a WP = 0, or if it is prudent to continue
to climb for some reserve altitude.

In a strong thermal, when you climb to Alt a WP = 0, it means that you have
climbed appreciably higher than the altitude required to make goal at best glide
speed. This extra height allows you to glide to goal at a higher speed. However,
if the last thermal is weak, the optimal glide speed is just a little more than
best glide, and the resulting calculated departure altitude will only be a
little higher than that required to make goal at best glide speed. Therefore you
would have only minimal extra altitude, and a small area of sink could prevent
you from reaching goal without another thermal. For this reason you should climb
to an altitude higher than Alt a WP = 0 if the last thermal is weak.

You can monitor your progress in the user-fields Alt a WP and A BG WP. Ideally A
BG WP should slowly decrease to zero as you arrive at goal, while Alt a WP
should stay around zero all the way to goal. Obviously these values will
fluctuate due to the nature of the air mass on final glide. Consequently you
should check these values periodically during final glide and take note of the
trend. If Alt a WP increases steadily, then you are generally in a favorable air
mass and can likely fly a faster speed ring setting. Conversely if Alt a WP
becomes increasingly negative, then the air mass has more sink than expected and
may require a less aggressive speed ring setting – but never slower than best
glide speed (McCready indicator = 0). If you encounter a large area of sink on
final glide, you will likely have to fly slower with a lower McCready indicator
value (of course after you clear the sink). If A BG WP becomes negative,
reaching goal without gaining some altitude is no longer possible.

If you fly through a good thermal on final glide it may be advantageous to stop
and climb. This will likely be the case if your last climb was relatively weak.
If, when you enter this new thermal, Alt a WP is negative, then there is a time
benefit to be gained by climbing. However, that benefit can only be realized if
you fly at a faster speed ring setting once you leave this thermal at Alt a WP =
0. The appropriate speed ring setting will be the climb rate that you have been
achieving on this climb. If Alt a WP is positive when you fly into a thermal on
final glide, then it would be a waste of time to circle there – unless there is
some other reason to gain altitude, such as pilots reporting bad sink ahead of
you, there is a ridge you need to clear, you are generally pessimistic about the
air mass ahead, etc.

My ground speed (Gnd Spd) is the top variable in the right column
in the first graphic above.

Flytec USA 6030 documentation:

The GPS receiver determines its position once each second. Ground
speed is derived from the distance between these positions and can be displayed
in the user-field Gnd Spd.

My current L/D over the ground (L/D gnd) is the variable displayed
below the Gnd Spd value. Glide ratio over the ground = ground speed divided by
descent rate. This value is updated every second.

My L/D required to get to goal (L/D goal) is the variable displayed below L/D
gnd. Given
my height above goal and the distance to goal, this is the required L/D to make
it there. If there is a waypoint between me and goal it takes the distance
needed to get to that waypoint and then to goal into
consideration in the calculation of distance to goal

My L/D goal is the same as the L/D req if the next waypoint is the goal
waypoint.

From the Flytec USA 6030 documentation:

Another way to monitor your progress on final glide is to compare
your glide ratio required (L/D req) and your glide ratio over the ground (L/D
gnd). If your L/D gnd is greater than L/D req then you are currently progressing
favorably and should make goal (provided L/D gnd remains greater than L/D req).
Conversely, if L/D gnd is less than L/D req then you are progressing below the
minimum necessary glide slope and will not be able to make goal unless you
encounter a more favorable air mass and/or gain some additional altitude. If you
control your speed so L/D gnd = L/D reg then you are flying the correct speed to
arrive at goal at 0' AGL and the McCready pointer (radial line in the vario
dial) will be indicating the corresponding speed ring setting. The McCready
pointer reflects the best speed ring setting from your current position to goal,
at least until the situation changes again. Some caution here, flying the speed
where L/D gnd = L/D req is generally not advisable unless it is abundantly clear
that conditions on course line are becoming more favorable. It is prudent to
back off of the the speed ring setting determined by L/D gnd = L/D req. By how
much depends on what conditions look like on the way to goal, feedback from
pilots in front of you, or your intuition. It is also important to note that
reassessing your final glide speed ring setting should not be done actively or
you will end up flying reverse speed-to-fly (slowing down in sink). Remember,
speed-to-fly assumes lift and sink will net zero, not that there will be no sink
on your glide. Reassessing should be done only after a significant period of
excessive sink (or lift).

In some competition tasks the last turnpoint is relatively close to goal and
thermal height and/or a favorable tailwind will allow you to achieve sufficient
altitude before the last turnpoint so that you can go on final glide before
achieving the last turnpoint. In this case the user-field A BG Goal should be
monitored. A BG Goal shows your altitude above your best glide line around the
remaining portion of the course (accounting for the wind). Since this value is
relative to your best glide line, it is good idea to climb above A BG Goal = 0
and gain some reserve altitude before going on final glide. If you wish to fly
above best glide speed (usually the case if the last thermal is good) then you
should climb even higher than your reserve margin. The user–field L/D Goal is
the glide ratio required to make it around the remainder of the course and can
also be monitored in this situation to help evaluate your progress.

Here is an analogous final glide screen for the Oudie 4:

TAS or true airspeed is displayed on the upper row in red.

Oudie 4 manual version 7.33:

True airspeed is determined by the pressure sensor.

The true air speed was derived from wind speed and ground speed. Which
means the accuracy depends on the accuracy of the wind speed calculations.
Groundspeed from the GPS is quite accurate. Andrej Kolar has said that the wind
algorithm is the best of any comparable instrument.

GS or ground speed is to the left of TAS.

Oudie 4 manual version 7.33 (should say):

Speed over ground (GS) = Groundspeed. This value will be negative
if flying into a headwind that is greater than your airspeed.

STF or Speed-to-Fly speed to the right of TAS

Oudie 4 manual version 7.33:

Speed to Fly (STF) = Speed to fly according to McCready theory which
takes the McCready setting and sink into account.

To fly at the Speed-To-Fly speed using the Flytec 6030 you just
increase or decrease you airspeed until the McCready Indicator is aligned with
the top of the Thermal Average Indicator. This means that you are using the
average climb rate in your last thermal as your McCready value. If you think
that the next thermal with be different than the last thermal, say half the
average climb rate, then you fly at the speed that puts the McCready Indicator
pointing to that value on the analog vario.



The Oudie 4 has you set your McCready value in advance of your flight
(although you can go in and reset it in flight if you like going through a few
menus and entering values from a virtual keyboard - something easier done in the
cockpit of a sailplane). So you are making an assumption about your average
climb rate during your coming flight.

Touch Menu>Volume&Alt. Enter your projected McCready value in the Mc[fpm] field.
The corresponding Speed-To-Fly speed will be displayed above the field. This is
determined from your polar and assumes that you are flying in neither sinking
nor rising air. The STF field value will change based on whether you are in fact
flying in sinking or rising air, as well as the wind speed and direction.

You can also set the McCready value here: Menu>Task>Tools>Options.

My best glide speed (Speed-To-Fly speed when the McCready value is set
to zero) is not displayed unlike on the 6030, unless you preset your McCready
value to zero.

My 20 second average climb or sink rate is displayed twice here, with a bolder
version near the top of the vario symbol. I can set the time interval for my
average climb rate.

My barometric/pressure altitude above mean sea level (Altitude ft QNH (Alt ft) =
Altitude in feet QNH) is displayed in the bottom in red.
My takeoff altitude is determined as per the excerpt from the documentation
below.

Oudie 4 manual version 7.33:

The altitude in the Oudie 4 is recorded at the standard pressure
of 1013.25 hPa. In order to know you current altitude above mean sea level and
your current flight level altitude the altitudes need to be corrected to
correspond with the real world. There are several ways how the Oudie 4 can
correct the takeoff altitude. It will typically assume that the pressure
recorded by the pressure sensor is relative to the standard atmosphere pressure
of

1013. 25 hPa (but it is even possible to correct for that, see below). It is
quite possible to correct the altitudes to QNH automatically with the data which
is already available on the Oudie 4. If you get the information from an external
source (such as the ATC tower or the competition task sheet) then it is possible
to enter the values manually as well. In order to correct the takeoff altitude
you need to go to Menu > Vol & Alt. Dialog.

By default the Auto QNH checkbox is checked. Auto QNH will try to correct the
takeoff altitude to your current altitude by searching for a nearby airport or
by using the Ground elevation at your location or (if all else fails) using a
very much averaged GPS altitude (but the latter is only a fallback and should
not normally happen since there is a worldwide terrain database already
installed on each Oudie 4). Auto QNH setting will give you a very good idea
about the current pressure level and it works automatically without your input.

If you want to change the altitude manually you should disable the Auto QNH
navbox and enter the takeoff altitude manually.

My distance to the Target (Dis) is displayed below the Target (next waypoint). On
the Flytec 6030 the next waypoint name is displayed at regular intervals
switching between the flight time values at the bottom of the screen.

The distance is to the center of the Target. If the Target is the last waypoint,
i.e. goal, then as with the Flytec 6030, we assume that the cylinder around the
Target center point is 400 meters so we don't need to use the Dist Oz variable
here, although it is useful during the task if large waypoint cylinder radiuses are
used.

Wind speed and direction are displayed right below the Dis variable.

Oudie 4 manual version 7.33:

The wind vector gives you a graphical and textual orientation
about the wind at current height. The new sensors (and clever use of the Kalman
filters if you like) allowed us to improve wind prediction considerably. In the
best case scenario Oudie 4 will give a useful wind estimate already after a
single 180 degree turn on the ridge. It also works at wind speeds higher than
your airspeed. Additional turns make the prediction better of course.

To the right of my barometric/pressure altitude above mean sea
level (ALt ft) in the bottom row is my arrival altitude above goal (not above
mean sea level) at goal, tArr. It is calculated
from my position taking into account my McCready setting and wind speed and
direction.

Oudie 4 manual version 7.33:

"Arrival altitude" will be positive when the glider is above the
calculated glide slope, and negative when it is below the calculated glide
slope. It is corrected for reserve altitude.

If I preset the McCready value to 0 fpm then my arrival altitude
will be based on my best glide speed. If I fly faster than my best glide speed I
will not make goal. I have no margin for error.

The right most variable on the bottom row is the wind speed
component in the direction that I am flying, (cWind)

Oudie 4 manual version 7.33:

Current wind component (cWind) = Wind component in current
direction of the flight. Positive values are tailwind, negative values are
headwind. Two numbers are displayed. First number is difference between
groundspeed and true airspeed. The second one is wind component derived from the
calculated wind at current altitude. When the two are significantly different
you will know not to rely on the calculated wind strength.

My current glide ratio
(Cur. L/D), and my required glide radio (tL/D) to get to goal (finish the task).
are the two variables in the second to the bottom row.

Oudie 4 manual version 7.33:

Flown L/D (Cur.L/D) = Current glide ratio estimated over the last
fifteen seconds of
flight.

Task required L/D (tL/D) = Required glide ratio to complete the task.

Flying final glides is the most comfortable when you use the
Required L/D and Current L/D navboxes . What they do is show the required
L/D to the finish line and current L/D you are doing at the moment. You are on
glide slope when Current L/D is higher than Required L/D. The calculation
already includes reserve altitude. The nice part is that it is insensible of the
McCready setting, glider polar, wind calculation etc. All of them can be wrong when
you try to do the math through the glider's polar.

Current L/D however is pragmatic - it tells you what you are doing. Required L/D
is pragmatic as well. It tells you what you should be doing. If Current L/D is
higher than the Required one you are doing good. If it looks like you can keep
going like that, you are doing great.

With the Flytec 6030 I can see
what my current L/D is and compare it to my required L/D to get to goal. Obviously
I want to have my current L/D greater than the required L/D but it will vary a
lot as I fly on final glide. If my required L/D is generally decreasing then I'm
on average gliding at better than my required L/D, which is good. I could speed
up some to get the two L/D's to come close to each other. If my required L/D is
rising then I may have to slow down or find some lift or at least glide into an
area where it stops increasing.

If my required L/D is less than my L/D at best glide in neither rising nor
sinking air, then depending on how far away from goal I am and what I think of
the prospects for lift or sink are ahead and also on the component of the wind
in my direction, I could just continue gliding without having to search for
lift.

I can compare my altitude at best glide above goal to my altitude above goal at
my current airspeed. My altitude at best glide above goal tells me how much
extra altitude I have as a safety margin. As I speed up that margin decreases,
which is fine as I get closer to goal. My altitude above goal at my current
speed tells me the altitude I will arrive at if I keep flying this fast. If this
value continues to be positive I can increase my speed to the point where I am
comfortable with this arrival altitude.

This all depends on how far I am from the goal, what I expect in the way of sink
and lift on the way to goal and what lift or sink I am currently experiencing
and the wind component.

With the Oudie 4 I can see my current L/D over the last 15 seconds and compare that with
the L/D required to get to goal. This is similar to how I would do it with the
Flytec 6030.

My arrival altitude at goal should be positive, if I want to make it to goal as
fast as my McCready tells me I should fly. It assumes that I am going to fly at
the Speed-To-Fly speed determined by my McCready setting.

As I fly on final glide I will want to be sure that my arrival altitude stays
positive and will have to slow down or perhaps find another thermal if it turns
negative.
I can fly at less than my Speed-To-Fly speed that corresponds to my preset
McCready setting, but I will not want to go any slower than best glide speed.

I find this way of expressing my arrival altitude to be less satisfactory than
the approach used by the 6030. With the 6030 I see what altitude I will get to
goal with given my current air speed (and all the assumptions that the
calculation makes) and I can compare that with the altitude I will arrive at
goal with if I fly at my best glide speed. I can change the predicted goal
arrival altitude just by changing my airspeed.

My profile used to display the Oudie 4 configuration above is found
here.

My Flytec 6030 configuration file is found
here.

The web sites for the Flytec 6030 and the Oudie 4:

http://flytec.com/6030.html

https://www.naviter.com/flytec-6030/

https://www.naviter.com/oudie/

https://www.naviter.com/download-manual-support/#Flytec