Sailteck’s factory calibration is second-to-none. Other manufacturers claim a precision of 1°, which simply means their displays repeat the same reading.
Accuracy, however, means the reading is actually correct – that the heading you see is the heading you’re sailing.
Inside each Sailteck, the magnetic sensor has a separation barrier from the battery so that magnetisation during transport does not affect the factory calibration. This means that there is no need to recalibrate a Sailteck.