AA is the fastest non-cash way. Visit the AA guide threads to learn about the angles and
how to choose ship, gun and strategy.

Finally, be patient because in the first 2 or 3 days you may gain nothing for terrible
aiming but after that is the rain of expert :)

Good luck !

UK= emerald. Great AA boad IMO

US= Atlanta or any of their remods
Brooklyn can do some AAing too

KM= Emden.

fastest way: burn all experts u have into vets, and do AA.
this way u maximize the expert gain per plane shot.

AA boat

KM MN or US is best for good Low Level AA. usually by lvl 20-30 you can use the ECL
and have some fast reloading AA guns to mount.
Great way to level up sailors and gain lots of experts on them as you go

AA