How to cancel voice navigation by Google Now?

What is the command to speak to get Google Now to stop it navigating, once initiated? I've tried everything I can think of (cancel navigation, navigate stop, navigate cancel, end navigation, navigate end, .....) but it still continues to try to navigate to the location I gave it earlier. I've searched for an answer to this, but have not found one.
Thanks in advance for help.

Originally Posted by pb2222

What is the command to speak to get Google Now to stop it navigating, once initiated? I've tried everything I can think of (cancel navigation, navigate stop, navigate cancel, end navigation, navigate end, .....) but it still continues to try to navigate to the location I gave it earlier. I've searched for an answer to this, but have not found one.
Thanks in advance for help.

I say "ok google", I wait for the tone that opens google's ears and say "cancel navigation" ... that's it. It works every time.