You can find the chart in this thread.
http://www.subsim.com/phpBB/viewtopic.php?t=39406
Hmmm thanks for the tests DeepSixNiner, always found the chart a bit odd myself but wasnt about to make scenarios to test it. I've heard so many differant opinions on this matter but ill trust you on it since you have tested (im an akula driver and i could swear i get detected more when i try the 10knot cruise)