While that may be ideal from an electronic perspective, I would argue not to take the time to turn the radio off. Instead, remove the uncertainty: turn "it might interfere" to "I've repeatedly practiced and never found a problem". Practice with your gear. If your radio causes interference with the searching beacon while the radio is in your pack, consider replacing it. Not only am I concerned with time in a search, the ability to use radio coms during a search is helpful in a group. This is particularly true if it's windy, the debris pile is large, or there are other factors making for challenging communication. Yelling doesn't always get through to the other searchers.
Just something to think about.
