B Young disapproves a pencil diagram Bolton created showing the ferry coming on a reciprocal course towards Motuihe & then turning on an elliptical towards Classique which was proceeding on a straight course out from Nth Browns Island.
The ferry travelling at twice the speed of Classique covered 3 nmiles as Classique covered 1.4 nmiles so each route was divided in a ratio of 2.21 – it worked out perfectly. M Pigneyguy had given a fixed point on his chart at Sth Motuihe & Classique had her starting point at Nth Browns Island.
B Young – “The problem with that idea is that in order to do that you’d need to have precise start points for both you & the ferry & neither you nor the ferry fixed their positions at that stage so it’s very difficult to make assumptions based on that information …much better if we could work with the information from the photos … so this was to show that the ferry turned 11 degrees to starboard ?”
Bolton – “That’s the effect of it, yes. Instead of him travelling on his 286* course, we’ve got the ferry coming up here & reducing clearance.”
B Young – “Yes I agree with you that one of my main concerns was when you alleged that the ferry was turning to starboard I went to a considerable amount of trouble to, 1st of all, ascertain whether it did turn to starboard at all & the answer is yes, it did move to starboard & the way I did it is entirely reliant on the information that you can see in photos 1,2 & 3 – I worked out a scale on the photo of how much each degree a turn to starboard would be measured on the photo, in millimetres – I got a figure of so many mills represented 1 degree of course alteration & I drew that on the photo & estimate that between photos 1 & 3 the ferry turned 2.4 degrees to starboard than it had been at the time photo 1 was taken. We don’t have any photos taken before that so I wasn’t able to get a figure for how much it had turned from 286* … from photo 1 to photo 3, the ferry drift was in my estimation about 2.5 degrees … was this significant to this whole incident ? My opinion is that a 2 or 3 or even 4 degree wander, 1 way or the other, as long as it wasn’t a deliberate turn which was obviously aimed to make things worse, that it would be quite reasonable for any larger vessel to yaw or meander those sorts of figures … I worked within the 3 photos we have & between photos 1, 2, & 3 there is a change of 2.4 degrees.”
Bolton questions why the only evidence B Young accepts is that within the 3 Photos considering M Pigneyguy had supplied his chart from Sth Motuihe to Browns Island showing the ferry’s turning from 260* before Motuihe to it’s theoretical course of 286* approaching Classique – the distance between the photos is just the last half nmile of a 3 nmile observed passage & Bolton had shown the ferry was already on 292 at photo 1. The method B Young used to determine a 2.4 nmile change of course within the photos & find that, or more, as being acceptable to wander or drift, is also a questionable professional standard.
Photo 1 taken by M Pigneyguy showing Sky Tower left & Nth shore ahead
onto which a line can be taken from the bow of the ferry
to mark the Sentinal Building the ferry is said be to heading to initially
Photo 3 taken by M Pigneyguy – your line from the ferry’s bow will now be going up the Rangitoto slope –
the buildings on Nth shore out of sight – indicating a continual turn towards Classique –
not a wander or meander as B Young suggests – this obviously has reduced the clearance seen here which would have been 463 mtrs if the ferry had kept a straight course..
The zoom effect in this photo makes comparison with Photos 1 & 2 difficult.
The ferry didn’t stop or appear to slow down to allow Classique to pass as M Pigneyguy maintained.