What does lightning signs mean ?

[bibi63]

Sometimes when Avalon does a routing, going downwind, it does a little jog to reposition itself (un petit bord pour se repositionner) and there is a lightning (eclair) sign at the beginning and the end of the leg (bord). What does that mean ?

Does that mean that this leg can be avoided by taking a bigger angle to the wind ? But it is faster to do as the router says ?

Thanks
Yves

[jef]

Think that just indicate a tack change and a penalty also.

[bibi63]

Ah OK, thanks. Simpler than I thought.
Yves