How to abandon a doctrine?

[unmerged(96109)]

Playing as Germany, I want to abandon my naval doctrine. How can I find that button?

 

[Thurak]

You need to start with the latest researched doctrine. If you choose that then there should be the button.

 

[unmerged(96109)]

Found it! Thanks.

Any idea about what of the two doctrines are best? Fleet-in-beeing or indirect strike?

 

[Tuna-Fish]

Found it! Thanks.

Any idea about what of the two doctrines are best? Fleet-in-beeing or indirect strike?

The best is base strike, then FiB, then sealane interdiction

More in-depth here: http://www.paradoxian.org/hoi2wiki/index.php/Naval_Doctrine

note that it is feasible for you to stay up to date with Base strike, even if your tech teams suck for it, by allying japan and getting blueprints from them.

 

[xtfoster]

Found it! Thanks.

Any idea about what of the two doctrines are best? Fleet-in-beeing or indirect strike?

Ultimately Indirect Strike is better, especially for carriers, but Fleet-In-Being is still better for a surface fleet. You ultimate choice should be determined by your Doctrine Teams.