4.1.5 Integration
The INS should provide functional integation meeting the following requirements：
4.1.5.1 Where a display or control is presented on a multifunction display unit then these should be redundantly available.
4.1.5.2 Validity* of the data should be provided for each part to be integrated.
4.1.6 Configuration control
It should be possible to display the complete system configuration, the available configuration. and the configuration in use.
4.2 Information and accuracy
4.2.1 Display of information
4.2.1.1 The INS should be able to display the information available in accordance with 4.1.2.3, 4.1.2.4 and 4.1.2.5 as applicable.
4.2.1.2 The INS should be capable of displaying output data available from the sensors.
4.2.1.3 The information should be displayed together with the indication of its source (sensor data, result of calculation or manual input), unit of measurement and status, including mode. (See 4.1.3 Integrity monitoring)
4.2.2 Accuracy
As a minimum, the accuracy of information should meet the requirements of the resolutions* adopted by the Organization. Additionally the INS should not degrade the accuracy of the data provided by the sensors.
4.3 Malfunctions, alarms and indications
4.3.1 Fail safe operation
The system's automatic response to malfunctions should result in the safest of any other configuration accompanied by clear indications and alarms.
* IMO resolutions A.529(13) and A.815(19)
