Skip to main content

203.2 Dangerous pit

ISOM 2017-2
203.2 Dangerous pit (ISOM 2017-2)

Geometry: point.


A highly dangerous pit, vertical shaft or abyss where a fall into the pit could cause severe injury or death. It is strongly recommended not to use such a feature as a control point. If this object is part of a possible route choice, it should be marked in the terrain with tape.


Footprint: 13.5 m diameter.

Colour: black, white (fill).


ISOM 2017-2 Revision 6 (January 2024): New symbol. Valid from 1st February 2024. Mandatory from 1st January 2025.

Correct examples