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10. The term “reduced visibility” means conditions in which visibility is reduced owing to e.g fog, haze, snow , or rain or other reasons;

11. The term “safe speed” means a speed at which a vessel or a convoy can navigate safely, undertake manoeuvres and stop within the distance required by the prevailing circumstances and conditions;


13. The term “fairway” means that part of the waterway that can actually be used by shippingfor navigation;

14. The term “left and right banks” means the sides of the waterway when moving from the source to the mouth. On canals, lakes and broad waterways the term “left and right banks” is assigned by the competent authorities in light of local conditions. However, it is recommended that for canals, the terms “right” and “left” should be defined as meaning to the right and to the left respectively of an observer facing the direction in which the numbers indicated on successive kilometer markings increase;

14 bis. The designations “right-hand side” and “left-hand side” of the waterway or fairway are understood to be for an observer facing downstream. On canals, lakes and broad waterways, the terms “right-hand side” and “left-hand side” are defined by the competent authorities;

15. The term “upstream” means the direction towards the source of the river, including sections where the current changes with the tide. On canals, the direction shall be determined by the competent authorities and the term “in the direction from point A to point B” shall be used. “Downstream” means the other way around;


17. The term “navigation by radar” means navigation, in conditions of reduced visibility, using the radar;

18. The term “inland AIS device” means a device that is installed on board of a vessel and is used within the meaning of the “tracking and tracing in inland navigation” standard.