What should I do in foggy weather by plane?

If the plane can't take off, you can only wait at the airport. If it takes too long, the airport will advise you to wait back or the airline will arrange a hotel.

if the plane can't land, it can only alternate to other airports, and then fly to the destination when the weather is good. Passengers are waiting at the alternate airport, or the airline arranges hotels.

When the water vapor in the lower atmosphere is saturated, the water vapor condensate is suspended in the air to form foggy weather, and the horizontal distance of visibility is less than 5 meters, which is called fog in meteorology. However, the visibility requirement for aircraft take-off is at least 6 meters, and the landing requirement for aircraft is even higher than the take-off requirement. Therefore, for the safety of passengers, the plane will only take off when the weather is seaworthy. Due to the poor visibility in foggy days, it is difficult for the plane to take off and land, otherwise it may cause an accident.

However, in bad weather, the pilot can use the instrument landing system to guide the plane to land, which is commonly called "blind landing". According to the precision and landing standard of ILS, ICAO divides ILS into one type, two types and three types. The minimum standard is a kind of blind descent, the horizontal visibility is above 8 meters, and the runway can be seen clearly with the naked eye; The second type of blind descent refers to the ability to take off and land within the visibility range of 4 to 6 meters; The highest standard is three types of blind descent. You can't see the runway effectively at any altitude. The pilot can only make the landing decision by himself, and rely entirely on the instrument to realize the take-off and landing of the aircraft. What kind of blind landing aircraft can achieve is determined by weather conditions, airport equipment support capacity, aircraft technical status and pilot's comprehensive technical level.