I was just thinking, in public safety the typical transmisssion is much less than 10 seconds. 30 seconds would be long, an 60 seconds almost unheard of.
60 seconds should be adequate for almost any amateur radio 'shared repeater' operation. If the OM needs more time, make a short pause (maybe see if there is something "important" needing to be broadcast), and then resume. This is more a good operating technique than anything to do with rules, kind of like not carrying on QSO's on a calling channel or monitoring both frequencies when trying to work Scarborough Island split on 20 Meters.... 73, Steve
