I apologise for taking so long to respond to the thread; I was uncertain about the issues under discussion, and whether I could contribute anything useful. However, I now think that I can say something new.
As I see it, this is an epistemic matter. Aussie Pete began by citing the observations by Colonel Williams (a committed Christian) in support of the hypothesis that the Earth is spherical. This implies that Aussie Pete believes that valid scientific conclusions can be drawn from empirical evidence. However,
Isaiah 11:3 says that Jews and Christians must not base conclusions on what they can see and hear, and the articles of faith of creationist organisations say that scientific evidence can never take precedence over the teaching of the Bible. In other threads, Aussie Pete himself has rejected the overwhelming evidence for evolution in favour of the Biblical teaching of a six-day creation, so he appears to have been inconsistent.
Later Aussie Pete (post 9) said that the Bible does not teach that the Earth is flat. He did not say what he would believe about the shape of the Earth if the Bible did teach that it was flat. D Taylor and contratodo (post 17) contradicted this, and contratodo cited Biblical verses in support of the hypotheses that the Earth is flat and the sky (or firmament) is a solid vault. If D Taylor and contratodo are correct and the Bible does teach that the Earth is flat, will Aussie Pete accept this Biblical teaching or will he continue to accept the empirical evidence presented by Colonel Williams?