Help I am navigationally illiterate?
 

Help, how to I plot an intercept? What are all these circly tools for? Is there a way to plot a alternate coarse without erasing your replotted and then return to replotted after you investigate that noise you herd?

Check the stickies there is quite a lot of information.

This thread will tell you all about how to plot an intercept course: http://www.subsim.com/radioroom/showthread.php?t=88961

Personally what i do is zoom in on the chart screen then use the rudder control(compass version not rudder position) to intercept,depending on the distance,time of day and any other vessels i dive to PD and sweep with the big ear on the front to get a better bead on the target,then surface and hammer towards the target untill i have it in my scope,once its sunk i click on the NAv Officer resume course icon and hey presto,unless youre sunk,all sorted.