A missing child is one of the most critical calls for service first responders ever respond to.
When dispatchers with Ouachita Parish 911 in Louisiana received a call regarding a missing child, first responders were immediately sent to the location where the child was last seen.
"It had been two hours since the child was reported missing and there were dozens of first responders in the area searching," Denise McKinney, Chief of Communications with Ouachita Parish Fire Department, said.
When the call for service was made, the caller stated that the child had wandered off from home in a rural location and could not be located by family members. Within minutes, first responders were on the scene performing a search.
After two hours had passed and the child had yet to be located, law enforcement officers worked with those involved in the case and relayed location information back to dispatch. With this extra information, dispatch determined that the child's possible location was a half-mile east of the area rescuers were canvassing.
The dispatcher involved in the call for service updated the possible location in her computer aided dispatch (CAD) system and the change was immediately reflected in the CAD narrative shown on the mobile data terminals (MDTs) used by first responders.
"The search area wasn't as precise as it could have been in the beginning," McKinney said. "Once the changes were made, that information was available to everyone, which helped locate the missing child."
With updated information, a district chief responding to the incident discovered he was in the center of the search area.
"The CAD map was so accurate that the child literally could have crossed the street first responders were traveling on," McKinney said. "As soon as the district chief saw on his mobile device that he was in the updated search area, he decreased his speed as to not injure the child. A short time later, the child was located. At that moment, I was so proud to have the CAD system that we have."
There are a few ways to dispatch emergency services when a call for service comes in to a call center.
Without computer aided dispatch (CAD) software, dispatchers send transmissions via radio to first responders. These first responders use pen and paper to record the information or commit the details to memory. To get to the scene, they might use their own mobile phone’s routing features, or rely on their own knowledge of the area.
Then there are dispatchers who utilize CAD software and send a response, but are unaware of the unit’s estimated time of arrival (ETA). Once the unit is dispatched to a call for service, dispatchers calculate the ETA based on the unit’s location, speed and route.
What dispatchers and law enforcement officers have learned is that a much more efficient way to get to the scene is through proximity dispatching. With this method, dispatchers see where police, fire and EMS units are on a digital map in CAD software in real-time along with their continuously adjusting ETAs.
The continuously updated ETAs that proximity dispatching relies on are provided through the use of automatic vehicle location (AVL) functionality. This provides the most accurate information possible, so that dispatchers and first responders can see where all units are by looking at their digital maps either in the CAD mapping system or mobile data terminals in patrol cars, fire engines, or other emergency vehicles. Using this information, dispatchers determine which unit should be dispatched to ensure the quickest response.
AVL works by having each emergency vehicle equipped with global positioning system (GPS) functionality. By pre-programming GPS data into an agency’s mobile server, the mobile software located in police, fire and EMS vehicles communicates seamlessly back and forth to dispatch.
This same signal is sent to other units within the agency, all of which are able to view this information using the maps on their mobile devices.
AVL technology continuously sends latitude and longitude coordinates back to the CAD system so that dispatchers always know the location of a unit.
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