Warning signs
Warning: Overhead obstacle
- IMO code
- WSS020
- ISO 7010 number
- W020
Where you will meet it
At low passages, companionways, frames and pipes above walkways.
What it means in practice
An obstacle overhead: duck. There is a reason you wear a helmet on board.
Legal basis
Annex to IMO resolution A.1116(30) (adopted 05.12.2017), table of warning signs. Graphic pattern of the symbol: ISO 7010.
This is not a legal text: in any doubt the current wording of the resolution and regulations decides.
Download
Sign colours are normative. The file is public domain or CC0 (a Commons recreation of the symbol named by the IMO annex).