When a battleship fires its guns, the momentum exchange is enormous.
Today’s invention makes use of that fact to help a ship perform emergency manoeuvres.
When a ship needs to stop urgently, it will attempt to run the propulsion units backwards. In addition to this, imagine it firing all of its guns forward simultaneously or in a very highly controlled sequence (this could be achieved electronically).
Such an action would greatly slow even a battleship.
With modern weapons such as railguns, it might be possible to fire them all in a coordinated way, in order to make sharper turns than would normally be achieved using just rudders.
