With respect to Article 3.09 paragraph 1 (a), the competent authorities may prescribe a height of less than 5 meters.
Note by the secretariat:
In accordance with article 9.04, paragraph 3, the following administrations prescribe a height of an upper masthead light less than 5 m:
1. Belgium: 4 m for vessels less than 40m long;
2. Germany: the regulations only define that the stern must be set, without information on the height;
3. Belarus;
4. Czech Republic;
5. Russian Federation;
6. Mosel Commission: yes, but only for vessels less than 40 m long;