Had this in a boys varsity game, I am the trail, A1 has the ball on the base line, he shoots and is fouled. My partner blows his whistle for the foul, the ball bounces off the rim and is still in the cylinder when B2 commits basket interference. This is what I did, but it felt weird, I blew my whistle held up my open hand, signled BI and came down with that same hand to count the basket. Is this the proper mechanic to use? It didn't feel right. After I did that I let my partner know to count the hoop when reporting the foul. What signal would you have used??

Dave B

According to the official NF signal number 23, you use the same signal for any made or awarded goal, just the same as you do to indicate a ball went in on a shooting foul.

BTW - If A1 has the ball "on" the base line, the play is dead since this is OOB :)

This is a case when you do not immediately signal two or three points. You were correct in sounding your whistle for the possible defensive BI, but you need to let your partner now that you had a possible defensive BI. The foul by B1 against A1 may have been a common foul and not a foul against by B1 against A1 who is in the act of shooting. If A1 was in the act of shooting your partner that score the points for BI. If the foul was a common foul the ball was dead immediately and the touching of the ball by B2 is not a violation of the rules.

Or the foul could have been on A.

Brian: You are absolutely correct.