Originally Posted by
27/09
Yep, there's quite significant deployment of MLAT in the "Land of the Long White Cloud ".
It's cheap way for the local ANSP ( I think it's called NATS in your part of the world) to provide surveillance , no more expensive radar heads. Along with ADSB it effectively shifts a lot of the costs of radar surveillance onto the aircraft owner.
But if I’m understanding it correctly it requires multiple off airport hardware units for monitoring in the airport vicinity which would incur costs to landlords for siting, utilities to power and connect the units if none exist and on going maintenance, similar to marker beacons which can incur significant costs.