From: St. Petersburg, Florida, USA
I don't know what the devs actually intended, but my experience is the same as Lokasenna's. A modest number of land based planes can indeed be supported by tenders.
It seems to be a bug. The AV/AVP code seems full of them. However, the impact is so slight I've never brought it up. So what if you can support 6 additional planes or something? That's nothing in the scheme of things, and the effort to exploit it is rather high. You'd be better served by just going through the trouble to move real aviation support there - and you're depriving yourself of the AV/AVP's actual best use, which is to support float planes at bases without airfields.
Some of the big allied AVs have 24 and even 36 support which gives them more LBA AV support than most small base forces.
Could be exploited badly by sending two or three of those types to get a base up and running long before base forces could be shipped there and unloaded. Wouldn't expect most forum regulars to exploit something like that, but the bug makes it possible.
I don't know if there is one that's 36, but there are at least 2 (if not 3) that provide 24. I stand by my previous statement that it's not really an effective use of them, though. Which would you rather face off against: an extra 24 AV supporting a known airfield with LBA, or 24 AV supporting Catalinas at a dot base that you're not necessarily looking closely at?
I have 5 Curtiss class AVs with 36 support.
Wasn't and wouldn't advocate using them in the manner I described, just pointing out its possibility.