IMHO, there is much room for improvement in defining situations where (and how) help should and should not be given, both solicited and unsolicited.

In particular, INT/OBS, a topic that is near and dear to my heart. :o

Sitch: Umpire who has primary responsibilty, either misses or simply does not call INT/OBS; but partner does.

What is the best way for partner to handle this?
a.) Do nothing, unless help is solicited.
> While this approach preserves the integrity of the primary caller, it could become a difficult situation with coach who would ask, "Well, if you saw, it why didn't you call it, especially when a Dead Ball call is prescribed by rule?"

b.) Offer unsolicited help..If so, how should unsolcited help be offered?
> While this approach is an attempt to "get it right", it could create the perception that one umpire is overturning another umpire's call.

Just askin' :confused:

I guess I'm a "call it if you see it" person, regardless of "primary area" for calls like INT, OBS, pitch hitting batter, UC; although will reverse if partner has a good reason. Of course, this does not apply to out/safe, catch/no-catch, etc.