Rocks manager Jamie Howell is likely to be without the services of the experienced defender at Nyewood Lane until after Christmas after he was hurt in their 2-0 win over Staines Town at Wheatsheaf Park on Tuesday night.
Charman, pictrured, confirmed the break after attending hospital on Wednesday and expects to be sidelined for eight to 12 weeks.
The defender spent some 15 years at Ryman South Horsham, making more than 550 appearances for his hometown club before being appointed Hornets manager in 2013.
Bognor Regis Town
In a message to fans thanking them from their support, Charman tweeted: "Thank you all for your kind support, youy messages are so appreciated. I didn't realise I had so many friends. Blown away really. #cheersguys"
* The Rocks signed 18-year-old defender Tom Cadman on loan from Brighton on Friday.
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