When should the observer-target direction be sent?

The observer-target direction should be sent when it changes by more than 100 mils. This standard is based on ensuring that any notable change in direction is communicated effectively among team members and command structures, avoiding any potential for miscommunication during crucial fire missions.

A change of 100 mils is significant enough to warrant reconfirmation of the data to maintain accuracy in targeting. Sending updates only for changes of this magnitude helps to minimize unnecessary updates and focuses the team's attention on substantial modifications that could affect the accuracy and effectiveness of the fire support.

In practice, the reasoning behind not sending updates for smaller adjustments, such as 10 mils or even 100 mils at times, lies in maintaining operational efficiency. Too frequent updates can create confusion, whereas a 100 mil threshold balances the need for accuracy with the realities of operational tempo.