This is for pure dogfight. If it's Naval Fleet, I learned the hard way that it's a BAD idea to use A2G missiles because of the VLS. If going to attack the ships you have to use either bombs (including bomb type SOD) or RKTL. I can't say anything about hunting other players in Naval Fleet because I don't do it.  :P

Thanks for all the tips, I'll try them all =D

EDIT: Also, when you die in Naval Fleet or TDM, you can either wait to respawn or push a button to respawn. Is there any penalty for pushing the button?

In Co-op, you will get an alert for Emergancy Repairs. This isn't the case for TDM/ Naval Fleet Assault as far as I can tell. You will still get a Shot Down Credit Penalty post mission.  

Gotcha, thanks for the clarification.

What is a Non-Standard Upgrade? I've seen some people mentioning it but I can't find something explaining it.

It is a bonus that upgrades any of your aircraft from level 5 to 6 (this upgrade is a really expensive one ussually) for free.

And how do we get it?

You could only get one from a Tutorial Challenge, see Challenges.

You could only get more from Random Drops. Note it will only be during Event Drop periods.

Thanks.

There is also another challenge available now. You must get 1 million points in Naval DM.