The idea behind this has been hashed in a thread at:
http://starfrontiers.us/node/3975
I'm just not getting KHs lvl 6 to go star ship skills anymore and lets face it players want to play the farm boy that events snatch from his dull existence and he ends up in space battles days latter.
I know the original system gave a level of gaming progression. I'm just not seeing it as realistic or neccessary.
Currently we're using Spacer Skills Revisited from SFman #10 where you have to get the prereques progressively and the change I'm thinking of is to simply have the prereques from that article to obtain level 1 in a star ship skill then you can progress in any skill as you choose. For instance you would need Computers 2 to get astrogation 1 but once you earned astrogation 1 you could simply pump exp into it and ignore computers so that it would be possible to be computers 2 and Astrogation 5
I can think of one or two PCs who recently had to take a prerequ skill over what they wanted and if we go with this change and you're not happy with that please email me and I will make every effort to resolve it.