My 1197 has the newest software upgrade and I use the ASGR-HA 1 meter accuracy GPS antenae.....

My speed reads down to 0.1 mph no matter what direction my boat is going...forward, backward, sideways, crossways....

The directional arrow turns into a donut below 0.6 mph.....

The donut does, in fact, move on the chart below 0.6 mph....but only actually about every 6-8 seconds...

HB claims that the the new software allows 4 X second GPS position update..

If the GPS speed readout is showing mph (indicating movement) ...even as low as 0.1mph...then one would tend to believe that the antenae does, in fact, know where it is and where it was 1/4 of a second ago...

Now, why this donut is not reflectling this knowledge of detecting movement every 1/4 of a second and showing this movement on the chart...