From Greenhaven's reply it sounds pretty much unchanged from when I did it in '79. Only other thing is don't get downhearted if half way through you think you've failed - the truth is that you will have no idea how you are doing.
The second day into mine a Petty Officer for some reason told me I HAD failed, which was pretty depressing just before the board interview. He was wrong, I passed, and I've got no idea why he said it.
Good luck.