No sea craft has the engine power to lift its cargo into orbit. ALL starships are able to do that according to Warships. (all PL7+ engines can work in the atmosphere and a PL6 ship with Planetary thrusters can do the same)
I'll do a little math to see how frikkin high energy is required to lift even a medium-sized seagoing cargo vessel. And we are not talking of just pushing his mass along as seagoing ships do on sea or spaceships do in deep space. There is a planet that strongly
wants to keep the cargo on the ground.
let's take a 20.000 ton ship for an example. Hansa Stravanger
seized by somali pirates was a 20.000 container ship.
To accelerate it by 1 m/s^2 in deep space you need to apply 20.000 N.
If you are taking off the planet gravity pushes you down with an acceleration of (roughly) 10 m/s^2, so you need to apply 220.000 N to accelerate the ship by 1 m/s^2
If we are talking of energy usage:
Kinetic energy to reach 1 m/s in space is 10 Mj
Kinetic energy to reach 11 m/s in a gravity well that will eat 10 m/s each second (so the "visible" speed would be 1 m/s) 1,21 Gj
in both cases there is an increase of one order of magnitude in Earth's gravity well.
(assuming that my use of physics is correct
Still, this opens some holes in the wall.... a ship created to travel only in space does not need all the bracing required to a ship that must withstand landings and take-offs.
Unless we say that a ship that has a gravitic engine will crumble under its own weight if the gravitic engine (that counters the gravity's effects) is depowered while it is on the ground.