As long as there is no fog, the plane can take off

I think (2) should be chosen

Because (2) says "unless foggy", then it is assumed that the fog is foggy and the plane cannot fly, then the second half of the sentence "otherwise the plane will take off on time" is "the plane cannot take off on time" under this assumption, and the subject stem is "foggy, the plane cannot take off", of course, it also includes the failure to take off on time. Therefore, (2) is established, on the contrary, there is no fog, and the plane can fly naturally on time, so it is also true that it contains the concept. However, (1) says "if the plane does not take off on time", then it is assumed that the plane can take off if it is not on time but the take-off is delayed, but the second half of the sentence "it must be foggy" is not valid.

Personal opinion, see laugh.

As long as there is no fog, the plane can take off

Which of the following correctly expresses the above assertion?

If the plane takes off on time, there must be no fogging.

If the plane does not take off on time, it must be fogged.

Unless fogged up, the plane took off on time.

The question stem is formalized as: no fog and take-off. , formalized as: take-off no fog; does not take off fogging; If you don't take off in fog, you can see that , the same as the question stem.

Can't fly, it will affect the flight. To be safe, you need to be patient. When the water vapour in the lower atmosphere reaches saturation, the water vapor condensate is suspended in the air to form foggy weather and make the horizontal distance of visibility less than 500 meters.

The visibility requirements for aircraft take-off are at least 600 meters or more, and the landing requirements for aircraft are higher than those for take-off. Therefore, for the safety of passengers, the aircraft will only take off if the weather is airworthy.

Due to poor visibility on foggy days, it is difficult for aircraft to take off and land, otherwise there is a risk of accidents. Data show that of the 245 serious weather-related flight accidents between 1951 and 1985, 47 were affected by visibility, which is second only to low clouds. Studies have shown that in the midst of many weather conditions that can cause reduced visibility, fog has an immeasurable impact on flights, and it can seriously hinder take-off and landing.

When there is fog on the route, it will affect landmark navigation; When there is fog in the target area, it has a serious impact on visual landmark flights, airdrops, photography, inspections and other activities.

From this point of view, it is very dangerous for an airplane to take off in foggy weather, and it must be eliminated! As a passenger, taking a plane itself is a happy trip, so you must pay special attention to your personal safety, take precautions, and put an end to all things that endanger your life, so that everyone can go happily and happily!

The aircraft cannot take off in haze weather, because low visibility will affect the piloting and flight of the aircraft, a slight impact will lead to a deviation from the course, and a serious one will lead to a crash, so it is generally not allowed to take off in haze weather.

Visibility is one of the important criteria for determining aircraft take-off and landing, and it is an inevitable factor to ensure the safe take-off and landing of aircraft. The haze weather is a fatal blow to the take-off and landing of aircraft. Low visibility will lead to the pilot's blurred vision, unable to effectively distinguish surface obstacles, navigational light indications, etc., resulting in potential risks such as aircraft deviating or rushing off the runway, resulting in serious safety hazards, and unimaginable consequences once an accident occurs.

The deterioration of visibility in a large area caused by haze weather will inevitably seriously affect the take-off and landing of aircraft, resulting in a large number of flight delays and returns. He Chan.

It depends.

If visibility meets the airport's minimum departure conditions, the flight can still take off normally.

If visibility is so low that it is enough to close the airport, no flights can take off or land.

In another case, the visibility does not meet the conditions for closing the airport, but the airline to which the flight is flying considers it dangerous to take off in such weather conditions and will delay the departure time of the flight.

Mainly the impact of visibility, generally less than 500 meters, you can't fly, the general airport is more than 600 meters, large airports, such as Beijing, the ground equipment is more developed, the requirements are lower.

First of all, run to the visual range RVR, and if it is lower than the airport regulations, you can't take off.

The most obvious one, if you can't see the end of the run, then you don't have to think about it.

Hello, in order to ensure the safety of passengers, it is not possible to take off during heavy fog.

No, the fog is large and the visibility is poor, the ground facilities cannot be seen clearly, and it is difficult to take off and land. It's easy to go out of your way.