Very slow approach - when to announce to help ATC?
The other day the following happened:
"xxxx turn now 240 degrees, when established descend on the ILS."
"yyyy need you to slow right down now company traffic ahead and you are catching up fast. yyyy what is your speed now?"
"220 now slowing"
....
after xxxx got established
"yyyy still need speed right back, what is your speed now?"
"185 and coming back"
......
"yyyy when establised descend on the ILS"
"yyyy is established"
.......
"yyyy STOP the descent now, this is not going to work. Turn immediate right 360 degrees. Height now 2,500ft please. Going to bring you around on a orbit to come back for the ILS"
......
"what happened? Very annoying..." says yyyy
"When xxxx turned into wind he slowed to what appeared to be only 110 knots ground speed, much slower than I expected..."
Anyway WHEN is expected that you should announce to ATC that your aproach speed is going to be very slow and what is "very slow"? Is it happening as much as it should? Are there any agreed protocols...?
A