terrapin X Quick start guide

CONNECTING
your TERRAPIN X to the Hornady 4DOF® ballistic calculator

1×
PAGE 01 OF 08
• By pressing and releasing the push button of your TERRAPIN X you turn on the device
• You will now see the digital aiming reticle in the display of your TERRAPIN X
Connecting your TERRAPIN X to the Hornady 4DOF® ballistic calculator

3×
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• Press and release the push button of your TERRAPIN X three times in quick succession to enter the Bluetooth menu
• In the display you will see the last saved setting. This can either be “OFF”, “APP”, “hESt” (for KESTREL) or “tdH”
Connecting your TERRAPIN X to the Hornady 4DOF® ballistic calculator

PAGE 03 OF 08
• Toggle through the options by pressing and releasing the push button of your TERRAPIN X until you reach “tdH”
Connecting your TERRAPIN X to the Hornady 4DOF® ballistic calculator

3×
• Confirm this setting by pressing and releasing the push button three times in quick succession
• As confirmation four dashes (“----“) will appear in the display of your TERRAPIN X
• Besides the electronic aiming reticle you will now also see a flashing Bluetooth symbol in the
display of your TERRAPIN X. This signifies that the TERRAPIN X has entered the pairing mode
PAGE 04 OF 08
Connecting your TERRAPIN X to the Hornady 4DOF® ballistic calculator

PAGE 05 OF 08
Connecting your TERRAPIN X to the Hornady 4DOF® ballistic calculator
• Make sure that Bluetooth is enabled in the general settings of your smartphone
• For iOS devices also allow access to Bluetooth in Settings > Privacy > Bluetooth
• Open the Hornady 4DOF ballistic calculator on your smartphone and enter the HUD screen
• In the top right corner of the screen click on “PAIR METER” to enter the “Setup Device” menu

PAGE 06 OF 08
Connecting your TERRAPIN X to the Hornady 4DOF® ballistic calculator
• In the “Setup Device” menu slide the switch labeled “Use weather meter” to the right
• To search for your TERRAPIN X pull down the white area of the screen below “DEVICES”

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• Once your TERRAPIN X is found by the Hornady 4DOF ballistic calculator,
click on the name of your device to establish a connection
Connecting your TERRAPIN X to the Hornady 4DOF® ballistic calculator

PAGE 08 OF 08
“METER PAIRED” on the HUD screen of the Hornady 4DOF ballistic calculator indicates
that your TERRAPIN X is connected to the Hornady 4DOF Ballistic calculator.
With an established connection the Hornady 4DOF ballistic calculator will use range, azimuth
and slope obtained by the TERRAPIN X for calculating precise ballistic solutions.
Connecting your TERRAPIN X to the Hornady 4DOF® ballistic calculator

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