To fire the Organ Gun, select a target according to the normal rules for shooting, then roll the Artillery dice and 2D6 to find out how many shots are fired.
If the Artillery dice rolls a misfire, no shots are fired and a critical fault has occurred; roll a D6 and consult the Black Powder War Machine Misfire chart.
The number of shots fired by the Organ Gun is equal to the total of both the Artillery dice and the 2D6 rolled. When determining the number of shots, roll that number of dice To Hit the target using the crew's BS and applying all appropriate modifiers.