3 General Requirements
3.1 General
3.1.1 Computer-based systems should fulfill the functional requirements of the system under control for all operating conditions including emergency conditions, taking into account'.
- Danger to persons
- Environmental impact
- Damage to equipment
- Usability
- Operability of non-computer devices and systems, etc.
3.1.2 If process times for functions of the system are shorter than the reaction times of the operator and therefore damage cannot be prevented by manual intervention, means of automatic intervention should be provided.
3.1.3 A computer-based system should have sufficient capability to：
- perform necessary autonomous operations,
- accept user commands,
- inform the user correctly,
under all operating conditions including emergency.
3.1.4 System capability should provide adequate response times for all functions, taking into consideration the maximum load and maximum number of simultaneous tasks, including network communication speed, under normal and abnormal process conditions.
3.1.5 Computer-based systems should be designed in such a way that they can be used without special previous knowledge, otherwise appropriate assistance should be provided for the user, as under 6. Training.
3.1.6 Computer-based systems should be protected against unintentional or unauthorized modification of programs and data.
3.2 Hardware
3.2.1 Hardware should be suitably designed to withstand supply voltage variations and transients, ambient temperature changes, vibration, humidity, electromagnetic interference and corrosion normally encountered in ships.
3.2.2 The design of the hardware should ensure ease of access to interchangeable parts for repairs and maintenance.
