I think that the author of that piece has misunderstood the tactics that were used in the raids against the Tirpitz.
The object was to achieve a concentration of bombing. Aircraft flew in waves of about 5 aircraft as near as possible to line abreast (as a loose "gaggle" not as a close formation as practiced by the USAAF) but with each aircraft on slightly converging courses, with waves separated by a few hundred yards and by altitude. The bomb aimer in each aircraft aimed his bomb individually. But the objective wasn't for each to try to hit the Tirpitz directly. The objective was to place all the bombs in a square around the Tirpitz (750 yards on each side was used during Paravane). So the bombs in each wave would be dropped virtually simultaneously, perhaps giving the impression of a command drop by the leader.
For Catechism, 32 aircraft dispatched (18 from 617 squadron, 13 from 9 squadron and one photo aircraft). Another 7 from 9 squadron were unable to take off due to icing and the high weight of the aircraft. 2 were late at the rendezvous point so didn't bomb.
So 29 Tallboys descended in the direction of Tirpitz in the space of 3 minutes.