Originally Posted by USMCFLYR

Uhhhhhh.......no )

"COUPLED APPROACH N/A" NOTE ON THE APPROACH PLATE SHOULD REMAIN DUE TO THIS FACILITY'S SENSITIVITY TO TIDE HEIGHT. THIS SENSITIVITY CAUSES INTERMITTENT LOW AMPLITUDE, HIGH FREQUENCY RIPPLE ON THE LOCALIZER CROSS POINTER WHICH GENERATES AUTOPILOT ISSUES AND USER COMPLAINTS. ENGINEERING CONTINUES TO WORK ON A RESOLUTION."

Now the facility is restricted "LOC UNUSABLE BYD 20 DEG LEFT OF COURSE" due to continued OT Modulations, but that isn't gong to causes +150 to -150 needle swings. Not I'm not sure how that 'high frequency ripple' would present. Maybe that is the cause of the fluctuations that you have heard about in the past.

It is amazing the folklore that is out there about different approaches and such.