Well, I did a quick test flight at KSEA, and I wrote down some data.For the ILS 16L, DGLAS is the FAF. The computer vectored me for a base at 12.1NM from DGLAS at 4000'. The crossing height for DGLAS is 2100', a difference of 1900'.So:Ground Speed: 224DME to DGLAS: 12.1Current ALT: 4000'Crossing HT at DGLAS: 1900'.That means I should be doing 3.73 NM/min and I should get to DGLAS in 3.24min.If I need to lose 2100' in 3.24min, then I should be descending at 648fpm.Now, I looked at the DESC page in the FMC and the V/S was shown to be 1476, and I missed writing it down, but I think the V/B was listed at 3.2 degrees. The V/B should be something less than three.Both of those numbers from the FMC don't match up with my math, so someone with better skills please double check.

The V/B should be something less than three.

Correct, it is about 1.7 deg. in your example.

I hope Jose Luis (basa) shares his opinion with us, too, he knows a great deal on the NG FMC.

Thanks for your kindness...but I'm afraid I can not give any help this time.I've been flying the PMDG-737 (usually the 700) for more than 3 years and I've never seen such things like V/B or VSR in the descent page.Terribly sorry. :(

Matt,The original NG was our first ever product for MSFS and as good as it is, it certainly has some shortcomings in the FMC department... this is probably one of them. The VNAV and other vertical path related stuff got a huge upgrade with the 747 and then was even further refined with the MD-11. Our NG2 is the next jet product and it'll likely be the best yet. Keep in touch here on the forum - we might be able to use you on the tech team when the time comes (with proof of real world type rating etc)...

Matt,The original NG was our first ever product for MSFS and as good as it is, it certainly has some shortcomings in the FMC department... this is probably one of them. The VNAV and other vertical path related stuff got a huge upgrade with the 747 and then was even further refined with the MD-11. Our NG2 is the next jet product and it'll likely be the best yet. Keep in touch here on the forum - we might be able to use you on the tech team when the time comes (with proof of real world type rating etc)...

Tabs,I'd be happy to help out. I'm new to the sim community. Any chance of a patch to fix some of the FMC issues, or is the emphasis only on the NG2?Matt

Matt: In my opinion (beta testers are do not speak for PMDG) there are no more updates forthcoming for the 737NG. You would be amazed at how much better the simulations are today than in the FS2002/2004 era, and they have assigned their limited resources to a thoroughly new product. I recommend the MD11 as an example at how much things have improved. Sure glad you are on board.

Some quick calculations from slew mode.9.9 lateral displacement from DGLAS (ILS16L KSEA)I slewed the jet to these ALTS above DGLAS:Above DGLAS (1900')01001100160021002600310036004100and came up with these data. The first number is the FMC Vertical Bearing from the sim, and the second is the TRIG calculated V/B.FMC --- TRIG 0 --- 00.2 --- 0.12.6 --- 1.053.8 --- 1.525 --- 26.2 --- 2.487.4 --- 2.968.6 --- 3.439.7 --- 3.91I wanted to just post a spreadsheet, but basically, at 9.9 miles from the fix you should be about 3000' above DGLAS and see a 3deg V/B. I calculated a 2.96 V/B but the FMC gave me 7.4 - 2.5 times the real V/B.Probably more than anyone wanted to know, but I'm getting a geometry review at least. ;)