TTN, if you have a map you might be able to do some calcs then.
Gan - Medan (target) - Butterworth.
I think that was the Victor plan. Our's, based on the Observer's Book of Aircraft data (the Victor planning cell at FEAF didn't have any real data) was initially Jakarta. This was not viable for several reasons. We would have been right on strategic war minimums for fuel, the PNR was close to Gan, beyond PNR we would have been committed to overflight of enemy territory with either unserviceable kit or worse, engine(s) out.