Index: /trunk/BNC/bnchelp.html
===================================================================
--- /trunk/BNC/bnchelp.html	(revision 1629)
+++ /trunk/BNC/bnchelp.html	(revision 1630)
@@ -595,10 +595,8 @@
 <p><a name="serauto"><h4>3.9.7 NMEA - mandatory for VRS streams</h4></p>
 <p>
-Select 'Auto' to automatically forward all NMEA-GGA messages (or any other message) coming from your serial connected device to the NTRIP broadcaster and/or save them in a file.</p>
-<p>
-The alternative is a 'Manual' simulation of an initial NMEA-GGA message based on the approximate (editable) latitude/longitude from the broadcaster's source-table and a default height of 100 meters.
-</p>
-<p>
-Note that sending valid NMEA-GGA strings (simulated or coming from your serial connected device) to the NTRIP broadcaster is required for receiving VRS streams.
+Select 'Auto' to automatically forward all NMEA-GGA messages (or any other message) coming from your serial connected device to the NTRIP broadcaster and/or save them in a file.
+</p>
+<p>
+Forwarding valid NMEA-GGA messages to the NTRIP broadcaster is required for receiving VRS streams. Thus, in case your serial connected device is not capable to provide them, the alternative for VRS streams is a 'Manual' simulation of an initial NMEA-GGA message. Its contents is based on the approximate (editable) latitude/longitude from the broadcaster's source-table and an approximate VRS height to be specified.
 </p>
 
Index: /trunk/BNC/bncwindow.cpp
===================================================================
--- /trunk/BNC/bncwindow.cpp	(revision 1629)
+++ /trunk/BNC/bncwindow.cpp	(revision 1630)
@@ -351,5 +351,5 @@
   _serialDataBitsComboBox->setWhatsThis(tr("<p>Select the number of 'Data bits' for the serial link.</p><p>Note that your selection must equal the number of data bits configured to the serial connected device. Note further that often 8 data bits are used.</p>"));
   _serialStopBitsComboBox->setWhatsThis(tr("<p>Select the number of 'Stop bits' for the serial link.</p><p>Note that your selection must equal the number of stop bits configured to the serial connected device. Note further that often 1 stop bit is used.</p>"));
-  _serialAutoNMEAComboBox->setWhatsThis(tr("<p>Select 'Auto' to automatically forward NMEA-GGA messages coming from your serial connected device to the NTRIP broadcaster and/or save them in a file.</p><p>The alternative is a 'Manual' simulation of an initial NMEA-GGA message based on the approximate (editable) VRS latitude/longitude from the broadcaster's sourcetable and an approximate VRS height to be specified.</p>"));
+  _serialAutoNMEAComboBox->setWhatsThis(tr("<p>Select 'Auto' to automatically forward NMEA-GGA messages coming from your serial connected device to the NTRIP broadcaster and/or save them in a file.</p><p>Forwarding NMEA-GGA messages is a must for VRS streams. Thus, in case your serial device is no capable to provide them, the alternative for VRS streams is a 'Manual' simulation of an initial NMEA-GGA message. Its contents is based on the approximate (editable) VRS latitude/longitude from the broadcaster's sourcetable and an approximate VRS height to be specified.</p>"));
   _serialFileNMEALineEdit->setWhatsThis(tr("<p>Specify the full path to a file where NMEA messages coming from your serial connected device are saved.</p>"));
   _serialHeightNMEALineEdit->setWhatsThis(tr("<p>Specify an approximate 'Height' above mean sea level in meter for your VRS to simulate an inital NMEA-GGA message.</p><p>The setting of this option is ignored in case of streams coming from physical reference stations.</p>"));