Thank you,
Danny42C for that reprise - which I now recall.
I defer to your concept of "Estuary Radar", and I am just glad I remembered something about it having nautical roots! It is vaguely possible I conducted an Approach at Manby using their kit (we were encouraged to liaise with them). IIRC they had 2 consoles, so as with MPN-11 doing multiple talkdowns there was the inevitable argument about where the beam tilt should be (depending on who had the aircraft on shortest final).
Brave guys worked that kit!! Indeed, any SRA requires a degree of mutual faith. I hated doing the occasional SRA using the Stanley AR-1 (Mobile) before retreating to the safety of my office in the corner of the Tower! I did one with a C-130 in really claggy conditions to Stanley's 09 (across the harbour, mind the stubs of the masts on the wreck of the
"Lady Elisabeth", and had a strong suspicion he just wanted azimuth info while he ducked below the 'notional glidepath' once safely (relatively) over the harbour!