How Satellite Reception May Affect an inReach Message or SOS

When a SOS is triggered on an inReach® device, it is important to ensure the device has acquisition with both GPS satellites and Iridium satellites for the reasons listed below:

• Three or more GPS satellites allow the inReach device to determine its current location.
• Iridium satellites allow the inReach device to communicate with Garmin Response™ Center during the SOS.

Connection to both satellite networks is important during the SOS to ensure Garmin Response Center is getting the necessary information to coordinate a response.

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IMPORTANT: An active inReach subscription is required for SOS to function.

Communication with either satellite system may be affected by various conditions. Below are some of the common conditions that may impact satellite communication on inReach devices.

Clear View of the Sky

An inReach device needs a clear view of the satellites for location acquisition and communication to be possible. These satellites orbit the Earth at varying altitudes, so they will be in the sky or near the horizon.

If the inReach device is in a canyon and has a very limited view of the sky, the satellite reception of both GPS satellites and Iridium satellites will be impossible or extremely poor. Moving to a location with a better, more open view of the sky and horizon, if possible, is recommended to reduce delays in inReach communication and location acquisition.

Electromagnetic Interference

Electromagnetic interference, also known as EMI, may have a negative impact on the ability of an inReach to communicate with satellites. EMI can come from human-made equipment, like high-voltage electrical lines, or naturally occurring events, such as lightning, solar flares, and electrical storms. Moving an inReach device away from equipment, machinery, or environmental conditions that are known to produce EMI would be recommended to allow the inReach device to have a better connection to satellites.

Wildfires

Wildfires produce large amounts of heat, ash, and smoke, which may have a negative impact on the reception of satellite signals. The ash and smoke may physically and electromagnetically block communication with GPS and Iridium satellites. Having a clear view of the sky is crucial for inReach satellite communication during a SOS.