Information concerning pre-eruption volcanic activity, volcanic eruptions and volcanic ash clouds;
Information concerning the release into the atmosphere of radioactive materials or toxic chemicals;
Information on changes in the serviceability of navigation aids;
Information on changes in condition of aerodromes and associated facilities, including information on the state of the aerodrome movement areas when they are affected by snow, ice or significant depth of water;
Information on unmanned free balloons; and,
Any other information likely to affect safety.
as well as information concerning:
Weather conditions reported or forecast at departure, destination and alternate aerodromes;
For flight over water areas, in so far as practicable and when requested by a pilot, any available information such as radio call sign, position, true track, speed, etc., of surface vessels in the area.