Runway centreline lights serve two main purposes:

• Inform the pilot about where the centre of the runway is (they are installed on the runway centreline.
• Inform the pilot about how runway end the runway is (by colour coding the final 900 m metres of runway centre line lights).

Their safety objective is to help prevent misalignments when landing and taking off, as well as to help prevent undershoots and overruns.

They are not always required, and in fact they are considered a complementary system to other visual aids such as runway edge lighting or runway markings, amongst others.

Runway centreline lights serve two main purposes:

• Inform the pilot about where the centre of the runway is (they are installed on the runway centreline.
• Inform the pilot about how far away the end of the runway is (by colour coding the final 900 m metres of runway centre line lights).

Their safety objective is to help prevent misalignments when landing and taking off, as well as to help prevent undershoots and overruns.

They are not always required, and in fact they are considered a complementary system to other visual aids such as runway edge lighting or runway markings, amongst others.