Well when you plot an intercept course you dont actually have to know where you are at the moment. Just where the target is relatively to you.
I usually observe targets at 2knots speed decks awash if on the surface.
I make all the intercept markings on the middle of the ocean. I select a position which indicates my position at the start of the plottin. The 0.00 mark. Then before I start making observations about my target I mark my second position (where I would be 3.15 minutes after) mark on the map using the speed charts. And the third position (6.30 mark) and fourth (9.45).
Now I can plot my course on the move. Ofcouse I could be going alot faster, but then my plotting wouldnt probably be as accurate.
I hope this clears up the method I use. Not sure I can explain it in anymore detail than this :hmm:
Sure I can try if you have any questions
