Check out the ONF forum section for guides here:

http://www.opennavyfield.com/smf/index.php?action=forum#6

These guides created by an ex tnf member :(NFEU)

http://sol-nfna.com/Guides123/cv.pdf

http://sol-nfna.com/Guides123/Harbor Asault.pdf

http://sol-nfna.com/Guides123/scout.pdf

http://sol-nfna.com/Guides123/sub.pdf

Thanks guys.
Am I understanding that you want your crew to of a higher level than your BO? I seem to recall that from the last time I played but I am not sure. 

yea its always better to hv a crew of higher lvl.
1. support gets less exp. so they often lag behind.
2. some ships (all bb4s i think) need higher lvl gunners to operate.
plus if u want to hv a bb6 u will need a full crew and that doesnt fit in most ships. u will need to rotate ur support and this slows their progress further. 

Ok so them I am going to want two ships of equal class(more of less)of the same nationality  to train up my crews? 

Thank you for the reply's btw 

yea lvling 2 bos is a good choice because most nations have at least 2 bb lines. on one hand u can keep ur crew at a higher lvl, on the other u will be able to use all bbs of that nation.