Length... The length of a ship is calculated often in meters with 1 meter= 1 tile. The thing is that your ship is 2 times shorter than you think if you measure it like that. Why? Let me explain.
Two people can fit in a meter of a straight line, for example:
4 people are waiting at a bagel store in a line. The line is about 2 meters long.
This means that with the huge ships mod, your ships have a maximum length of 500 meters.
Sense makes?