Really glad you found it useful Raymond. Hopefully I can do "proper" tutorials and convert the terminology to SH better.
The method you describe there looks pretty spot on as far as real life goes
My long term plan really is to add more tools and map / coastline features so it becomes practical to do manual navigation (the key think is to get the steuerman to stop being quite so drunk in calm weather, he's all over the place if you don't gave him a proper waypoint). All this combined with some of the celestial breakthroughs going on at the minute should hopefully mean full manual navigation will become a relatively straightforward reality.