Lone Worker Prompt Response

Prompt Response to a Lone Worker in Vehicle Rollover

Loner IS Castle Group










A major customer of Blackline Safety deployed the company’s Loner IS employee safety monitoring solution to it’s lone workers. Certified intrinsically safe, Loner IS provides customers with market-leading safety monitoring for use within hazardous environments, such as Oil & Gas, Manufacturing, Agriculture, and industrial applications. This customer deployed Loner IS to monitor the real-time safety of Field Operators, Geologists, Instrumentation Technologists, and Mechanics.

Castle Group Ltd are the UK Distributor of all Blackline GPS Lone Working devices for Lone Workers.


In 2013, one of the customer’s personnel was returning from the field on a drive to his home town—a drive of several hours from the remote work site. Winter weather, combined with darkness and fog, contributed to poor driving conditions on the secondary highway that the employee was driving along. A momentary lapse of focus resulted in the vehicle losing traction, over-steering to
the right. The driver over-corrected, causing the vehicle to lose control and slide off the road sideways. Hitting rough terrain, the vehicle began to roll and came to a stop on its passenger side.

As the vehicle rolled, its contents were thrown around, causing minor injuries to the driver. Wearing his seat belt per the company’s safe driving policy, the driver was not thrown from the vehicle although the driver side window was broken. The action of rolling caused minor neck and back injuries that ultimately made it difficult for the driver to free himself and move easily within the vehicle.

His mobile phone was originally located in a cup-holder between the driver and passenger seats. During the roll-over, the phone was thrown around within the vehicle, the screen cracked, and came to a rest on the backseat passenger door. The driver’s Loner IS device slipped off his belt during the incident and came to a rest on the unbroken front passenger side window.


The strain of the roll-over caused the driver to lose consciousness for a short period. The lack of Loner IS movement sitting on the passenger window for two minutes triggered the No-motion Detection pre-alert. It began to call out to the driver with an audible and visual alarm, requesting a check-in. The driver was not able to respond to the alarm within thirty seconds, causing Loner IS to communicate a No-motion Alert and his precise GPS location through its wireless communications to remote monitoring personnel.

The continuous audible alert caused the driver to stir and he was able to free himself from his seat belt. He made his way down to the Loner IS device and silenced the alert by pressing and holding the Acknowledge Button. The Loner IS device that was assigned to him six months prior reassured him that help would be on the way soon. A few moments later, his mobile phone rang but he found the device in the backseat area, he was unable to answer the phone due to the cracked screen not accepting his input. Monitoring personnel were trying to reach the injured employee’s mobile phone and escalated the incident to his supervisor without the phone being answered by the employee. Knowing the employee’s precise location, monitoring personnel were able to efficiently dispatch emergency services per the supervisor’s request.

After approximately 15 minutes, an ambulance reached the location of the roll-over, having been dispatched from a nearby town. Paramedics were briefed as to the driver’s location on the secondary highway and were able to prepare for the situation and weather conditions. The driver survived with only minor injuries and greatly appreciated the response efficiency. As weather worsened, he could only imagine what may have resulted had he not been carrying a Loner safety monitoring device.

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