private void NorthMarkerTimer_Tick(object sender, EventArgs e)
{
if (North_Marker_Received == true)
{
North_Marker_Received = false;
if (checkBoxSystMonEnabled.Checked)
{
HandleSystemStatusCAT34I50();
}
if (this.checkBoxSyncToNM.Checked == true)
Update_PlotTrack_Data();
}
}