Originally Posted by
j.sabourn
"............ For those not aware Head up the tube, all targets are relative bearings only and do not show the course and speed this had to be done by plotting usually in 6 minute intervals with a minimum of 3 which made 18 minutesto work out the course and speed and estimated nearest approach. Things these days due to modern technology is much easier and can be plotted very quickly. I doubt in 1968 they had all the up to date technology even of that day. It was not a requirement, and as most shipowners obeyed the law and no more, have no doubt the Wahine was properly equipped for her day. JS