In ABOM 2017 forest stages, there are some vegetation covered reentrants difficult to cross. In some cases, the organization took the decision to create some artificial opening corridors.
In the map, the opening corridors are signaled with 708.0 symbol (Crossing Point). Although not mandatory, it is advisable to use these passages.
In the terrain, red and white tape is used in the corridors, as illustrated in the next photo.