I have a question about the marine navigation system

[chenlanlan]

While sailing today, the navigation screen suddenly went black. After restarting, it turned back on, but the positioning keeps jumping and shows “weak signal.” I confirmed the antenna isn't obstructed, and it worked fine in the same area before. Is this a hardware failure, or do I need to reset some settings?

 

[Scott Danforth]

What system? What model?

Is this a new to you boat, or an old boat with a new problem?

 

[dingbat]

“Weak signal” is an obstruction of some sort, physical/electrical, or a wiring/hardware issue unless you’re around a military installation. Then all bets are off