MTR: It goes without saying that all plays are different. What I am saying is that the default position should be 1 or 2 steps fair for the reasons given. It is virtually impossible to lose sight of the BR's foot as it comes down on the base from 1 or 2 steps fair. Now compare that to going closer to 45 degrees. Going even at a maximum of 45 degrees puts the defender's entire body in your line of vision of the BR's foot as it his the ground. I know this for a fact. We run countless drills demonstrating it and umpire from all walks of life, new and veteran, all agree that they lose sight of the BR's foot right when it is coming down if they go more than 2 steps fair.
Experiment with this. Position an umpire one or two steps fair. Then position another umpire 4 steps fair (closer to 30 or 45 degrees). Have a 1st baseman stretch normally as if to take a throw from short stop. Start the BR about 15 feet from 1st base and slowly jog down the line. Ask each umpire to say "stop" when they lose sight of the BR's foot. I guarantee you that the umpire 4 steps off the line will say "stop" and the umpire 1 or 2 steps fair won't. Since the BR's foot is one of the most important elements of the play, wouldn't you prefer that the umpire see the foot hit the base?
I wasn't a believer either until I gave it a few tries. I also realized that it appears to slow the play down. It does so because rather than losing sight of the BR's foot at the last minute and have the play sort of explode in front of you as she reappears and overruns the base, using 1 step fair allows you to have continuous sight of the BR.
I agree that you can have a tag in the back. Those are tough calls to get right and I don't think being 30-45 degrees helps you out much with them. At least if you were 1 or 2 steps fair, you can at get the swipe tags on the side of the BR's body correct.
There are exceptions to 1 step fair, such as on throws from the imaginary box and throws from the right fielder. These positions differ because of the position of the defender at 1st base and the need to get out of a direct line of the throw.
Experiment with this. Position an umpire one or two steps fair. Then position another umpire 4 steps fair (closer to 30 or 45 degrees). Have a 1st baseman stretch normally as if to take a throw from short stop. Start the BR about 15 feet from 1st base and slowly jog down the line. Ask each umpire to say "stop" when they lose sight of the BR's foot. I guarantee you that the umpire 4 steps off the line will say "stop" and the umpire 1 or 2 steps fair won't. Since the BR's foot is one of the most important elements of the play, wouldn't you prefer that the umpire see the foot hit the base?
I wasn't a believer either until I gave it a few tries. I also realized that it appears to slow the play down. It does so because rather than losing sight of the BR's foot at the last minute and have the play sort of explode in front of you as she reappears and overruns the base, using 1 step fair allows you to have continuous sight of the BR.
I agree that you can have a tag in the back. Those are tough calls to get right and I don't think being 30-45 degrees helps you out much with them. At least if you were 1 or 2 steps fair, you can at get the swipe tags on the side of the BR's body correct.
There are exceptions to 1 step fair, such as on throws from the imaginary box and throws from the right fielder. These positions differ because of the position of the defender at 1st base and the need to get out of a direct line of the throw.