2 umpire mechanics

[Dakota]

Additional info.

No outs.
F6 fielded the ball and made the throw inside the baselines - in the infield.

Very good teams, play developed very fast.

BU was outside the baseline, and R1 remained upright between BU and F5, who came off the base a couple of steps for the throw and tag attempt.

IMO, BU should have been closer to 3B, but the play was too fast to get there. May have been positioned too far away to being with. BU was not moving with R1, but expected a play at 1B.

I was BU - critique - I can take it. I was astonished at my partner's answer, though. Any comments there? (We had not worked together before.)