Essa é a marca do ponto de mira, estilo do Reino Unido. O UK AIP GEN 1.7 ( 2018-8) observa as seguintes razões para a marcação diferente:
- The shape of the marking means that 1/3rd of it is outside the centre 3rd of the runway and is therefore less prone to rubber contamination.
- The marking is more easily identifiable as it differs from the TDZ markings.
- It provides enhanced visual cues for the angle of approach.
(Fonte: CAP 637: Manual de Recursos Visuais , maio de 2007 )