David Martin(Offline)

Also a couple of corrections to tasks for this dive

Team 2 - Andy, Rich
Head north east with goal of adding a series of lines running approximately east-west between the North line and the zig zag line

Team 3 - David, John Grogan
Survey North line, tieing in the zig zag line to the North line and the Capstan winch to the North-west line. Survey newly tie-ins.

Team 3 - Rob, Osama, Ricardo
Perform survey of the South east and south south east line triangle

Comments for the afternoon dive.
This was to be the first dive where we tried to obtain survey data. Due to the limited time available we decided that we would simply obtain distances and bearings to create a map of the lines (including key features where they were on the lines). When the lines were laid it was often not possible to determine where they started on the other lines which meant that Wednesday's sketch map contained a number of significant uncertainties or guesses as to where some of the newer lines had been laid. Those affecting the south-east / south south east lines had been resolved in the morning's dive, whilst those to the north were not discovered until Team 3 started the survey on the afternoon dive. The survey teams were able to complete the major objectives and although there was not enough time overnight to update the main map we were able to draw an updated line map sketch.

We elected to leave the tape measures behind and to rely on knot counting combined with estimating distances smaller than knot intervals. We realised after this dive that we ought to have gone for knots at 1m, rather than 5m, intervals due to the scale of the wreck. This is the sort of thing you only realise for the next time around having both seen the size of the wreck and tried to survey using the knots.

David