The above water section of the line should be sufficiently light that its movement is unpredictable to avoid habituation by birds and sufficiently heavy to avoid deflection of the line by wind.
Ba cheart go mbeadh an chuid sin den líne atá os cionn an uisce sách éadrom chun nach bhféadfadh na héin a gluaiseachtaí a thuar nó nach rachadh siad i dtaithí uirthi agus ba cheart go mbeadh an líne sách trom chun nach gcuirfeadh an ghaoth dá treo í.