Although the Kims had a cellular phone with them, their remote location in the mountains was out of range of the cellular network, rendering the phone unusable for voice calls. Despite being unusable for voice calls, their cell phone would play a key role in their rescue. Cell phone text messages may go through even when there appears to be no signal, in part because text messaging is a store-and-forward Service. Two Edge Wireless Engineers, Eric Fuqua and Noah Pugsley, contacted search and rescue authorities offering their help in the search. On Saturday, December 2, they began searching through the data logs of cell sites, trying to find records of repeaters to which the Kims' cellphone may have connected. They discovered that on November 26, 2006 at around 1:30 a.m., the Kims' cellphone made a brief automatic connection to a cell site near Glendale, Oregon, and retrieved two text messages. Temporary atmospheric conditions, such as tropospheric ducting, can briefly allow radio communications over larger distances than normal. Through the data logs, the Engineers determined that the cell phone was in a specific area west of the cellular tower. They then used a computer program to determine which areas in the mountains were within a line-of-sight to the cellular tower. This narrowed the search area tremendously, and finally focused rescue efforts on Bear Camp Road.