User`s manual

Freq uently Asked Questions (con’t)
Why does my GPS work with my NAV program but not with Win881SS?
The serial port used for the GPS input must not be in use by another program when
invoking Win881 SS (only one program can have access to any one serial port). Ensure
that the GPS receiver unit is setup to output $GPGLL, $GPGGA or $GPRMA messages
at 4800 bps, No Parity, 8 Data Bits and 1 Stop Bit.
Why does the “No Data at COM1” message always flash when using my Toshiba
Laptop computer?
The serial ports on Toshiba laptops behave differently than on other laptops. From the
Start menu, highlight ‘Settings’ and click on ‘Control Panel’. Double-click the
‘System’ icon to invoke the System Properties page. Click the ‘Device Manager’ tab
and Double-click the ‘Ports (COM & LPT)’ setting. Double-click ‘Communications
Port (COM1)’ to invoke the Communications Port (COM1) Properties page. Click the
‘Port Settings’ tab and enter the following settings:
Bits per second = 115200
Data bits = 8
Parity = None
Stop bits = 1
Flow control = Xon / Xoff
Click the ‘Advanced…’ button to invoke the Advanced Port Settings page. Set the
‘Receive Buffer’ to the Low(1) setting (left-most position) and press the ‘OK’ button.
You can also try disabling the ‘Use FIFO buffers’ check box.
How far off the bottom should I tow the SportScan?
The SportScan altitude should be 10 to 20 percent of the operating range above the
bottom. For example, if the operating range is set to 90 meters, the SportScan should be
9 to 18 meters above the bottom (remember the 30 meter maximum depth limit!).
When the bottom is nearly flat, you can tow close to the bottom. When the bottom is
not flat, tow at a higher altitude.
Note: If you are towing in unknown area where there could be obstructions, it is best to
tow the SportScan just beneath the surface to avoid collisions with unknown objects.