My Opinion on Unmanned or remotely operated fighting vehicles,
Land, [ame="http://en.wikipedia.org/wiki/Protector_USV"]Sea[/ame] or
Air. Is that they should be limited to reconnaissance, scientific payloads and should have
NO offensive capability. I believe that the tendency towards offensive drones will cause more casualties on all sides due to the tendency for commanders to use soldiers in the same manner as drones (IE in more risky situations).
There are some advantages to UCAV's in Air to Air combat, They are not limited to the physical abilities of the pilot and don't have to lug around a load of stuff (Ejector seat, cockpit, Life support, pressure vessel ect.). Meaning that 12+G corners are possible making them harder to it and track.
The disadvantages are that they are reliant upon communications that can be jammed or hacked (no matter what the advertising says..). Have limited situational awareness, they cant look out and scan the horizon in a second. If its not spotted and actively tracking an attacker in a dog fight it is just as likely to re-engage countermeasures as any missile.
And anyone who says that they can be programed to identify countermeasures so to avoid them, I say it is nature that any advance that is made on this would be countered with new countermeasures faster than could be dealt with.
UCAV's are considered cheaper because the pilot is not put at risk, as the cost of training a pilot (and possible recovering from the ground) is a significant part of the cost of a combat aircraft system.
---------- Post added at 10:43 ---------- Previous post was at 10:34 ----------
Also there needs to be a clearly defined diffrence between a UCAV and Missile other wise cruise missiles could be classed as an UCAV.