From the original starshot project we know that information is exactly the aim. Though at the moment we are not yet on the level of technology to compactify eno

From the original starshot project we know that information is exactly the aim. Though at the moment we are not yet on the level of technology to compactify enough the transmition equipment. There is no manuever which can help with 0.2c velocity drop. Individual gravitational assist manuever usian a planet of the solar system can add/remove hundreds of meters/second (depends on the planet mass and how close to its center we can pass). Plus the vehicle flyies-by the object used for such assist. Since Alpha Centauri is literally the closest star system, there is nothing on the way to be used for such an assist (preferably a star).