@msolga,
msolga wrote:
With all due respects Walter, they would have seen the Queensland coast from that ship, right maps or wrong maps.
Well, I've never been there. Might well be that you see so far in the southern hemisphere on sea.
msolga wrote: And if the captain wasn't even aware of the Great Barrier Reef being so close to the Qld coast, then how on earth did he come to be in charge of such a vessel?
I don't think that it's a question of knowing how close something to some other place is - it's more the question to know where my ship is.
(When I was asked 'Where are we?' I always put my finger on a point on the chart ... and then made the correct position
. But as said, 6 nautical miles isn't that much, generally, however in such an estuary ... )