When can the plane take off? What are the specific standard rules?

Minimum weather standard for airport takeoff: for twin-engine aircraft, visibility? 1600m.

During flight operation, the captain and flight dispatcher should strictly implement the minimum meteorological standards for takeoff listed in the company's operation specifications. Whether air traffic control permits or not, no one is allowed to take off when the weather conditions reported by the meteorological system approved by the authorities are lower than the company's operating specifications. The flight dispatcher shall not approve the release of any aircraft of our company.

If there is no minimum takeoff meteorological standard for the airport specified in the operation specification, the minimum takeoff meteorological standard used shall not be lower than the minimum takeoff meteorological standard specified by the bureau for the airport.

When taking off from the alternate airport, the weather conditions of the airport should be at least equal to the minimum weather standard specified in the operation specification of the alternate airport.

When the minimum takeoff meteorological standard or a slightly larger value is adopted, the runway visual range report in the contact area can be used for control, regardless of the reading conditions of the intermediate or taxiing runway visual range. If the runway visual range report in the contact area is not available, visibility is mainly used for control.

The captain must abide by the minimum landing meteorological standards stipulated in the Operating Rules of the airport and the company. Landing below the minimum weather standard stipulated by airport and operation rules is not allowed.

Unless the visibility and cloud height of the latest meteorological report issued by the meteorological system of the landing airport recognized by the bureau are higher than or higher than the minimum standards stipulated in the instrument approach procedure, the aircraft shall not fly over the last approach point to continue the approach.

If the final approach of the instrument approach procedure has started, and the updated meteorological report is received at this time, and the reported meteorological conditions are lower than the minimum meteorological standard, the driver can still continue to approach to the decision high or the minimum descent high. At any time before reaching the decision height or minimum descent height, it is not allowed to continue to approach below the decision height or minimum descent height and land unless the following conditions are met or the relevant operating requirements of the Enhanced Flight Visual System (EFVS) are met.

The aircraft is in a normal position continuously, from which it can descend to the runway planned to land at a normal descent rate using normal maneuvers, and at this descent rate, the aircraft can be grounded in the grounding area of the runway planned to land.