[91] I accept that the Bayliner could not have travelled very close to the Coomera Island bank because of the shallow water and mudbanks in that vicinity. However, it would have been able to travel on the plane closer to the channel. As to the shearing of the propeller blades, and reliance on high school physics, the scenario advanced by Mr Balnaves' submissions of the Bayliner being stopped or almost stopped at the time of impact is inconsistent with eye witness evidence which commands acceptance. In any case, the impact of the vessels was not directly bow to bow. The Bayliner's bow impacted with the Haines Hunter on the port side of the Haines Hunter, forward of midships. The evidence of eye witnesses was not to the effect that the collision involved a glancing impact which knocked each vessel slightly off course. Instead, the evidence was of a forceful collision. There was no reliable evidence of the precise movement through the water of each vessel immediately after the collision and, understandably, the parties did not seek to rely upon "expert opinion" that attempted to reconstruct the movements of the vessels after the collision.[142] On the basis of reliable eye witness evidence, particularly the evidence of Mr Collins, I find that immediately after the collision the Bayliner was in shallow water above a mudbank on the Coomera Island side of the channel. It is possible that as a result of the collision the Bayliner went backwards into this mudbank, resulting in its propeller blades being sheared off. It is also possible that the propeller blades hit Mr Smith, resulting in his severe injuries. The propeller blades may have hit some other hard object in the river or in the mudbank.