[Kirby_TFS]

Arronblood,
I was working through the examples and trying to get in my mind why we do each step in using the MoBo. I can see the intercept, get the actual course and speed, find distance, etc., and enjoy the MoBo program. I'm not interested in using it as a paper solution as that does take too much time. But when working through problem #3 in change of station it is not making any sense. I know that the CPA is going to be after the ship crosses the ownship's path. Could you possibly work this one out and publish the how's and why's for each step? Also are there any general rules to follow in getting solutions? I enjoy working these problems, but don't always know why I'm getting the answers. If the answers were not posted I would have worked several of these wrong.