[Typo3] redirecting unconfigured pages

[David Banning]

How would I redirect an error like this;

"The Page is not configured! [type= 1][]" 

One example is;

http://skytracker.ca/index.php/Booking/16/1/

Which comes as a result of me deleting an old page. Google has a number
of links to pages on my site which are now non-existing, but Google
still sees them as web pages because they are coming up as typo3 error
pages! I would prefer to just have them go to my main page.

I already have a 
ErrorDocument 404 http://skytracker.ca/
in my .htaccess

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