Thanks for the rapid reply, Fahnenbohn. The map was very useful

and I think that I have found the problem that I had getting your mod' to work. Whilst waiting for your response I carefully checked the readme instructions and think that I have found the problem. Your instructions read:
'1. Place gridXXXX.tga in SH3/data/menu/gui'
I think that it should read:
1. Place gridXXXX.tga in SH3/data/menu/gui
/layout
(possibly using \ not / if I was being picky) - Unless there is something else that I missed. If not I hope this is useful to you. Either way, I have it working now and will make good use of it

.
I have now located the co-ordinates and at precisely 03:10 H.M.S. Hood just disappears. Is that it? Is that all you get in SH3 GWX?
All the best,
The Professor