Sonar - only works if connected to internet?

Dear All,

 

According to the online help, 

"Symantec recommends that your computer remains connected to Internet to get the real-time protection against threats and proactively detects unknown security risks on your computer."

 

 

So what (if anything) happens when we are not connected - do we lose all Sonar benefits?

 

Thanks,

Swordbyte