Underway
The better to cruise in the deep, it was found (with current technology atleast) was the humble solar sail.
Here, Fishy Fishy!
Mighty arms craning outward, laden not with solar sails but webs of carbonized nano-steel. "here we go, lads!" the captain cheered, pressing the yoke into a hungry charge. "keep up the fusion feeds!
SENTIENCE - Chapter One - Orbit
Despite our expansive solar sail, the pressure of the star's light was nowhere near strong enough to slow us to a sensible entry speed. and unlike back home, there was no laser system changing our velocity. we were coming in screaming.
Homeworld
The solar sail at the ship's stern would catch the light pumped from earth station and carry them to mars.
Para-Imperium Technology
The thrust achievable is far greater than normal fusion torches and acceleration exceeds that of solar sails. a typical cruising speed for interstellar voyages is half the speed of light, but velocities up to .7c have been recorded.