I'd expect the pole would be one of two lengths.
The J/30's J measurement is 11.5'. The class standard pole is J+1, so I'd expect a J/30 to have a 12.5' pole.
A J+1 pole can incur a PHRF penalty (i.e. 3 seconds), so it's possible that a previous owner who only races PHRF might have shortened the pole to 11.5'.
[This message has been edited by rdpierce (edited 07-14-2004).]