Distance Scale in combat

[Suicide Junkie]

Now consider that all engines in SE4 say slower than light speed travel (unrealistically) on them. One combat square is more than 3 light years if you call it a parsec. Doesn't quite work out.

Why do you say "unrealistically"?
While sublight speed travel is a given in RL, the warppoints in SE4 will give FTL travel... The description implies that ion,etc engines aren't what are used to travel warppoints.