If possible, refer to these diagrams when reporting faults, fallen OLE or fires in OLE.
Structure Numbers are placed on every mast, using a specific numbering format.
LINE NAME DIRECTION/LOCATION
A = Armadale line
F = Fremantle line
J = Joondalup line
M = Midland line
R = Rockingham line
T = Thornlie line
C = City to Claisebrook line
D = Down
P = Platform
S = Siding
U = Up
UD = Up/Down