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A
The minimum altitude of around 1 000 ft must be reached because most EFG take 20 to 30 seconds to inflate.
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B
The pilot must reduce the IAS to the certified speed because of the excessive loads on the EFG at high speed.
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C
Straight and level flight must be established in order for the EFG to inflate symmetrically.
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D
The rate of descent must be reduced to 0 ft/min to minimise the vertical loads on the EFG when deploying.
A minimum altitude of around 1 000 feet cannot be the right answer considering that it is possible to utilise the flotation gear during autorotation execution, aiming to have the least exposure time to drag penalties and limited spatial disorientation.
For the same reason, there is no need to establish an absolutely straight and level flight to arm or inflate the gear.
However, the speed limitation for deploying a helicopter's emergency flotation gear varies depending on the type of gear and the model of the helicopter.
The deployment speed is specified in the helicopter's flight manual and should not be exceeded.
The speed limitation is set to prevent damage to the gear or the helicopter during deployment due to excessive loads at high speed.
Exceeding the speed limit can cause the gear to deploy improperly or even break apart, reducing its effectiveness in an emergency landing on water.
Therefore, it's important for the pilot to follow the procedures outlined in the flight manual and to reduce speed to the specified limit before deploying the emergency flotation gear.
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