Hi and welcome
1) For hot refuel/rearm you need to stop your plane on one of the small squares with the little shack by them at either end of a runway and hold it there for 30 seconds.
2) The radar has two "resolutions": the sector radar and the dot radar.
The sector radar will show approx. how many either enemies and/or friendlies each sector contains, by the length of the bar shown in each sector. Green bar indicates friendlies and red enemy. For every two planes in a sector the bar will increase in length. That means you will be unable to tell whether a sector contains 3 or 4 enemies for instance.
The dot radar will show the "exact" location (more like a 1 km resolution). Friendlies are of course the greens and enemies are the red. For both of them they will dissapear from your map if they go below 500 ft off ground (note you altimeter is Air to Sea alt)
This means vehicles (friendlies ore enemies) will NOT show on radar ever. (unless someone drives one off a cliff in which case he might be visible for a few seconds

)
Enemy dots will furthermore not be visible if they are more than about 15miles of a friendly airbase (vehicles bases have no A2A radar), or if they have destroyed the radar at the field. Friendly dots will show all over the map.
Instead of just destroying the radar at the field you can knock down all a country's radar (even friendlies) if you destroy their HQ building.
3) Pretty much answered under 2). No they don't show as dots on radar, but you might get a hint that vehicles might be in a sector by looking at the Sector Radar as this counts in everything, also below 500ft (For instance sector radar shows many enemies in same sector as airfield, but no radar dots visible. This could also be due to broken radar dish at field, or a very low furball ect.)
Else you just have to keep a lookout for them. Note however that their Icon won't show up for you until you are 1.5K away from them, so you need to look for a little yellow dot (pzr or Flak) or a little green one (M3 or M16) Unlike planes, vehicles won't be shown as a dot at about 15K, but won't be spottable until about 7-8K.
4)Under 'setup' and 'net status' you will see two graphs. The lower one are HTC's stability I think. It is normal that it gives out a little peak ones in a while.
Your own connection can be viewed at top. For a good connection this should be a flat line, with maybe one pixel oscilliation around the center. This is not ping time, but difference in ping time which is more important (Better to have a steady 300 ms ping than one that ranges from 100 to 250ms all the time.
Also for quick reference of immidiate connection problems keep an eye out for the "beacon" lamp on your cockpit. This should be grey at best, but if your connection is unstable it will change to either green, yellow or red, where red of course is the worst.
you can also try use an external program to see if you are having trouble. I use pingplotter found at
www.pingplotter.com and you then use this to trace your connection to either
www.hitechcreations.com or alt.hitechcreations.com
the last one is the alternate route that you can try to use if you are having problem with the main arena. It is accessed through the "closed" room just below the main arena entrance. It really isn't closed.
Hope this answers your questions well.
Snefens
Aces High Training Corps
<edit> ahh I see someone already answered you while I wrote this. oh well.
[This message has been edited by LLv34_Snefens (edited 10-29-2000).]