Originally Posted by
surfnfly
Here's the deal - Flying into SFO - cleared for the visual 28L and told to maintain 2,500 and 180kts till 6DME - What DME do you use????? LOC DME or SFO vor? The difference between the two is roughly 1.5-2 miles -I interepreted the clearance as the SFO vor and started down at 6DME from SFO; which puts you on glideslope or right about there - the CA on the other hand started to FREAK out because he/she(will remain nameless and genderless for the sake of argument) had the LOC up and was looking at the DME off the LOC - If you look at any charted visuals into SFO the DME is in reference to SFO not LOC dme - anyone else ever run into this??

In that situation everything is referenced to straight-in on the extended centerline, which implies the localizer DME unless otherwise specified. It would be a little odd to have you hold 2500' until you had blown through the GS, but certainly legal on a visual.