China Eastern Airlines passenger plane mu5735 crashed, and Malaysia Airlines mh370 lost contact. So far, the black box has not been found. And black boxes are hard to destroy and burn, and can signal others to look for. So, can the black box be located? If the black box has a signal, but it hasn’t been found, there must be a reason. In fact, if the plane falls, the black box is plunged into the soil or falls into the deep sea, the signal may not be detected.
In fact, the positioning of the black box is completely different from the positioning of the mobile phone as we understand it, and it cannot even be regarded as the same technology! It does not mean that the black box is on the ground and can be found by positioning.When the black box is in a plane crash, the black box will automatically emit a specific frequency in all directions, similar to a heartbeat-like regular radio signal for searchers to find.However, if you dig too deep into the soil, such as more than tens of meters, the signal will become weak, and even if there is no signal, it will be more difficult to find。
The black box can actively send out signals, and the instruments that send out such signals are called “underwater locating beacons”. Once the passenger plane falls to the bottom of the sea, it is best to find the black box within 30 days. Otherwise, when the power is exhausted and the black box will no longer transmit signals, then finding the black box is like looking for a needle in a haystack.
After the black box is found, the specific cause of the plane crash can be analyzed. Therefore, in the event of an air accident, the staff will pay more attention to finding the black box. However, the battery capacity of the black box is limited. If it has not been found for more than a month, it may be exhausted and it will be difficult to find it.