Prevention of the catastrophes
Spacecraft Curl is most suitable for operative interception of a terrestrial ballistic rocket. It is provided by the almost instantaneous start of the spacecraft on Earth to the velocity, commensurable with the velocity of a meteor in Space.
By that the spacecraft has ability and instantaneous to reduce velocity of the flight from peak V (which more than velocity of a meteor, see Aircraft Cylinder) to null. Its this double ability allows to solve the fantastic problem. The spacecraftgravekettle can score many time for a controllabled meeting of an asteroid «in a forehead» without collision with it and instantaneously, safety for itself, to be switched to the counter motion with velocity of the asteroid. The subsequent flight control of the asteroid will allow the spacecraft to decline the asteroid from its path to Earth.