Is there a way to exclude units form arrs?

On the vehicle edit screen there is a tick box above the unit shift times with "Exclude in the Alarm and Response Plan". TIck that and the corresponding ARRs won't select it.

I mentioned this in the LSSM Discord, but I'll state here if anyone else is wondering.

You could also custom class your PSU units, then select the box for "Only dispatch as custom class".

Then you can create an ARR for all of those custom classes.

This is what I've done so that my PSU units dont go as IRVs, but also still can be used in their own ARR.

This is quite a clunky solution, people wanted the PSU carries to count as a IRV but now they dispatch as one.
I have 100 PSU carriers accross my setup and to assign each one to a individual class would be teedious and slow.

It would be better if they just reverted it to how it was and for players to send an aditional IRV.

Quote from Ascot114

This is quite a clunky solution, people wanted the PSU carries to count as a IRV but now they dispatch as one.
I have 100 PSU carriers accross my setup and to assign each one to a individual class would be teedious and slow.

It would be better if they just reverted it to how it was and for players to send an aditional IRV.

That might work for a PSU. However, putting inspectors,medics,sergeants,etc into an IRV will still require a custom class

Exactly and in the force that covers me. The sgts and inspectors have their own vehicles if they need to go out so a solution could be a superviosrs vehicle that you toggle what level it is eg sgt or inspector.

This wouldn’t really be possible as there is no way to assign an ARR to a training rather than a vehicle. Custom categories is your best way to do this