Slow Biker
At Song Song Range we did indeed use an offset on the Float Target, to avoid damaging or sinking it. We built in a correction factor to the Bombing Angle at the Bombsight Sighting Head to give a 200 yard undershoot on the target.
In 1964 or 65 the target had been replaced with a brand new float, The first attack, with 25 lb Practice Bombs was made by a 45 Sqn crew. They applied the 200yd offset, but, unfortunately the Nav Observer managed to drop the first bomb with a 200 yd error. It was of course an overshoot, so, inevitably it was a Direct Hit on the Float Target causing enough damage for the target to need to be towed away for repair. He was not very popular at HQ FEAF.