calli1:
I have the same problem.
I have XM weather on my 1197c and periodically it stops working.
I have to get on the Sirius website and send a radio activation signal to my receiver to
get it working again.
I have no idea why this is.
Now, I just send the activation signal a couple times a week (especially the day before I go fishing). It won't hurt anything it you did it a thousands times a day.
You may not have to take you boat out of the garage to get good GPS.
I get GPS and XM weather with my boat in a closed garage.