Question

The conventional symbol for canal

Answer 1

Answer:

The conventional symbol for canal is represented by below attached form

Answer 2

The canal is shown as two lines drawn in parallel with a lock or a double arrow. It is normally in blue colour.

EXPLANATION:

The canals almost look the same as the rivers and are drawn in blue colored lines. The lines are straight and they do not meander like shown for a river.  

These are sometimes even shown without the locks like the Suez Canal which is shown on the maps. The Panama Canal is shown with locks on the Eastern and the western sides on the map.