Prohibition signs
No thoroughfare
- IMO code
- PSS004
- ISO 7010 number
- P004
Where you will meet it
At the entrances to areas closed to traffic: crane operation zones, mooring areas during manoeuvres, cargo decks.
What it means in practice
No thoroughfare. The area is closed, temporarily or permanently, to anyone not involved.
Legal basis
Annex to IMO resolution A.1116(30) (adopted 05.12.2017), table of prohibition 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).