Hi,

What is the minimum radar separation for aircraft on the same localizer?

suggest you move this one to the ATC forum - you can expect an expert response there.

OK, good idea!

2½ miles

Excellent...my devious plan worked to manipulate someone like Alex into giving us the answer!

Thanks Alex!

Tango

Whilst Alex is spot on it's worth adding the caveats to achieve that minimum.

Minimum of 2.5nm between succeeding a/c which are established on the localiser within 10nm of the runway end provided:
>The average statistical occupancy time of landing a/c does not exceed 50 seconds
>Braking action is good and no contaminants
>Radar must update in azimuth/range every 5 seconds or less
>The aerodrome controller is able to monitor the runway (visually, surface movement radar, surface movement guidance and control system)
>Wake Turbulence minima not a factor
>A/C approach speeds are closely monitored by the controller
>Crew must be aware of the need to exit the runway expeditiously when this minima is being applied
>Procedures concerning the application of this minima are published in the AIP

From AFT Av Law notes - hope this clarifies.

2.5 answers the question - at this point, that's all that matters.