The us navy wants to buy a new submarine. what does it need to do to get the funds?

I believe they would need the The state department’s approval

Before approving the proposal to buy the new submarine, the state government will put several factors into consideration.

Including things such as the federal funding that is allocated for military (usually different depending on the current president) and how crucial is the purchase for the state ( in war period, the approval might be made a lot faster)

well this isn't a question but if you are asking if it is true or false it is, true.