Velocitek S10 Manuel utilisateur
Velocitek S10
Thank you for purchasing the Velocitek S10 GPS Sail Training Tool!
The S10 provides the following functions to help you take your sail training program to the
next level:
•Current speed display in knots, updated once a second
•Upwind and downwind velocity made good (VMG) display in knots, updated once a
second
•Absolute maximum speed recall
•Fastest 10 second average speed recall
•Automatic background data logging of latitude, longitude, time, speed and heading at
two second intervals
•Downloading of up to 10 hours of GPS data through a USB cable to a PC running
Veloc tek Control Center
software (both the .gpx format requrired by
GPS Action Replay
and the .kml format required by
Google Earth
are supported
i
Velocitek S10
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Installing Batteries
The S10 uses two AAA batteries. Commonly available rechargeable Nickel Metal Hydride
(NiMH) batteries are recommended. Two 750mAh NiMH cells will provide approximately 10
hours of battery life. Disposable alkaline batteries will also work although they will have a
somewhat shorter life.
Insert the batteries into the metal clips on the circuit board as shown in the following
photograph.
Warning: Be careful to align the batteries according to the ‘+’ and ‘-‘
signs printed on the circuit board.
Warning: Be careful to orient the batteries as indicated by the “+” and “-“ symbols printed
on the circuit board.
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Turning on the S10 for the First Time
Open the waterproof case and turn on the S10 using the black power switch. The figure
“Inside the Waterproof Case” at the beginning of this document shows the location of this
switch.
Once the device has started searching for satellites, place it outdoors with a clear view of
the sky for 15 minutes. This allows the device to download the information it needs to
operate from Global Positioning System (GPS) satellites. After the initial download, this
procedure only needs to be repeated when the batteries are changed. This device will not
work indoors, in built-up urban areas or dense forest, due to a very weak GPS signal in
these areas. When the device has acquired a GPS solution, the display will stop flashing.
Warning: Before entering the water, make sure that the rubber gasket
around the perimeter of the waterproof case is clean and undamaged.
Make sure to remove any sand on the gasket. Keeping this gasket
clean is your responsibility. The S10’s warranty will not cover leak
damage due to a sand-contaminated or damaged gasket.
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Operating Modes
The S10 has the following two operating modes:
•Speedometer Mode
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•VMG mode
The decimal point after the second digit in the display is used to indicate which mode the
device is in.
To change modes:
In VMG mode, performing this same procedure will return the device to speedometer
mode.
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Speedometer Mode
In speedometer mode the device will show your speed in knots, updated every second.
The device also records your maximum speed and your best 10 second average speed.
Note: If your maximum speed is greater than 9.9 knots the display will blink back and
forth between the whole number and decimal portions of your maximum speed. This is
illustrated below:
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Clearing the Maximum and Best 10 Second Average Speeds
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VMG Mode
The S10 calculates your VMG based on a wind direction that you set using upwind and
downwind reference points. When the wind shifts from the direction you set, the accuracy
of the S10’s VMG measurements is reduced. For shifts of less than 10 degrees in either
direction, however, optimizing the value displayed by the S10 will still get you very close to
optimizing your true VMG.
Entering Reference points
The following example shows how to store your current position as the downwind reference
point.
Apply the same procedure with the “Max / U” button to store the upwind reference point.
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Using Reference Points to Enter the Wind Direction
Enter the wind direction into the S10 as follows:
You have now given the device two reference points that define the wind direction. The
device has stored the geographical coordinates of the two reference points and assumes
that the wind direction is the same as the heading from the downwind point to the upwind
point. These points only serve to tell the device the wind direction. They could be
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anywhere; on the beach, in the parking lot or on the water. The only thing that matters is
that the one point is at least 75m directly upwind of the other.
It is possible to set the reference points in the opposite order, i.e. upwind first, then
downwind. Also, the reference points can be reset independently. That is to say you could
change the upwind reference point while keeping the same downwind point.
Reference points are stored in non-volatile memory so they are not lost when the device is
switched off. If you often sail somewhere where there is a consistent seabreeze you don’t
need to program in a new wind direction every time you train with the S10.
After you have stored the locations of the two reference points, the S10 will indicate both
your upwind and downwind VMG in real time. This will always be a positive number. When
you are pointing higher than a beam reach this will be your VMG upwind, if you are sailing
lower than a beam reach it will be your VMG downwind. If you sail on a beam reach the
device will display a very small number no matter how fast you are going.
Logging GPS Data
Whenever the S10 is turned on and has a GPS solution (i.e. when the display is showing
speed or VMG and not flashing “00”) it will record the following data in its built in flash
memory at two second intervals:
•Latitude in degrees
•Longitude in degrees
•Time (GMT)
•Speed in knots
•Heading in degrees true
The data logging happens automatically. The S10 has enough memory space to hold over
10 hours worth of GPS data. Once the memory is full, the device stops recording new
information.
The only way to remove data from the device’s memory is to follow the procedure
described under
Clearing GPS Data from Flash Memor
ybelow. Removing the device’s
batteries for any length of time will not erase the memory.
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