Thank you for the explanation. I may be doing something wrong, but it appears I am seeing something different. For instance, if you look at UA flight 862 SFO-DEN on May 6, you will see availability of NF1 NC0 on 757 equipment. But if you pull up the seat map either on KVS or on united.com you will see there are only two cabins (even though United.com does say there is both an F and C cabin, and you can click on seating for either F or C, but you will see that the seat rows are the same). The same shows on 319 equipment for UA flight 838 SFO-DFW May 6 (there are no UA 319's with 3 cabins- that I know of anyway!). Thanks again.
As
rankourabu had already noted, UA creates 'virtual' C cabins for US domestic sub-segments of those multi-stop flights. The only way to tell the difference between a 'virtual' C cabin and an actual C cabin is by requesting a Seat Map.
[KVS Availability Tool 6.1.0.R1/Diamond - Amadeus Operational Info: UA 862/06 May 2011]
Code:
UNITED AIRLINES - UA 862
[Planned Flight Info]
SGN-HKG 05:50/Fri - 09:25/Fri 02:35
HKG-SFO 11:30/Fri - 08:29/Fri 11:59
SFO-DEN 11:13/Fri - 14:44/Fri 02:31
[Flight Notes]
SGN-HKG MEMBER OF STAR ALLIANCE
SGN-SFO MEMBER OF STAR ALLIANCE
SGN-DEN MEMBER OF STAR ALLIANCE
HKG-SFO MEMBER OF STAR ALLIANCE
HKG-DEN MEMBER OF STAR ALLIANCE
SFO-DEN MEMBER OF STAR ALLIANCE
SGN- DEPARTS TERMINAL 2
HKG- DEPARTS TERMINAL 1
SFO- DEPARTS TERMINAL 3
-HKG ARRIVES TERMINAL 1
-SFO ARRIVES TERMINAL I
SGN-DEN MCT FLIGHT TRACKING I/D
HKG-DEN MCT FLIGHT TRACKING I/D
SFO-DEN ON-TIME PERF 8JAN11
SGN-HKG 9/ NON-SMOKING
SGN-HKG 10/ SHORT FEATURE VIDEO
HKG-SFO 1/ MOVIE
HKG-SFO 9/ NON-SMOKING
SFO-DEN 9/ NON-SMOKING
SFO-DEN 10/ SHORT FEATURE VIDEO
SGN-HKG SECURED FLIGHT
HKG-SFO SECURED FLIGHT
SFO-DEN SECURED FLIGHT
SGN-HKG ET/ ELECTRONIC TKT CANDIDATE
HKG-SFO ET/ ELECTRONIC TKT CANDIDATE
SFO-DEN ET/ ELECTRONIC TKT CANDIDATE
SGN-HKG EP
SGN-SFO EP
SGN-DEN EP
HKG-SFO EP
HKG-DEN EP
SFO-DEN EP
SFO-DEN 081/006/N/000/ JAN11