angular momentum and initial angular orientation.
because without the orientation of you space ship, angle of thrust is meaningless.
And perhaps local gravitational field.
F = m dv/dt ; t = I dw/dt ; r = dv/dt ; w = d(theta)/dt
four equations, done.
Because all the money in those big countries has gone to the "national security" rather than going to tackle something that can take out the human race.
But I doubt proton decay is true. We have been looking at kilotonnes of water 24/7. Never observed once. :|
lol we don't need coral reef for technological advance.