# Navigation System

There are various navigation system parameters located within this tab. Most important is the "IMU" and/or “Orientations & Offsets” section which includes IMU to GNSS antenna offsets, IMU orientation, and Vehicle/Body rotation.

![SpatialExplorer 4.X Navigation System rover settings interface](/files/-LTy5OVXAIOOsN12JjN4)

![](/files/-MEdjgmZrtKYk_UcyOOG)

## Configuration

The Configuration page lists various navigation system parameters. Do NOT change these parameters unless indicated.

### System Type

The System Type refers to the type of the SPAN card in your system. Do NOT change this parameter unless indicated. Please refer to the [Determine Vehicle/Body Rotation](broken://pages/-LVoqwLj3WP6y_-K2euy) section for more information.

| System Type | Description                                   |
| ----------- | --------------------------------------------- |
| Dummy       | Used for demo purposes                        |
| OEM6        | Used for systems containing an OEM6 SPAN card |
| OEM7        | Used for systems containing an OEM7 SPAN card |

### Type of Antenna / IMU (SpatialExplorer 4.X)

This field lists the type of GNSS antenna used by rover as well as the IMU model. The antenna model list is pre-populated with numerous antenna models, each sorted by Antenna Code.

### Antenna Type

This field lists the type of GNSS antenna used by rover. The antenna model list is pre-populated with numerous antenna models, each sorted by Antenna Code.

### IMU orientation

Properly entering the Vehicle Body Rotation in SpatialExplorer version 5.X requires clicking on the "Configure..." radio button, which will open a new window that allows the user to enter known OEM6/7 values or use our Axis Mapping matrix.

![IMU Settings Configuration Window](/files/-M6pg7m2INb8VNqMs56h)

###


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```

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