Sigg, I did this with a broader brush.
IMTU,
Jump drives for vessels from 10-99 tons become available at TL16.
Jump fuel requirements are halved at TL17.
Jump drives for vessels from 1-9 tons become available at TL18.
Jump fuel requirements are halved again at TL19.
IMTU,
Jump drives for vessels from 10-99 tons become available at TL16.
Jump fuel requirements are halved at TL17.
Jump drives for vessels from 1-9 tons become available at TL18.
Jump fuel requirements are halved again at TL19.