Formations taking off and landing together is obviously a thing in VFR, but I'm curious if these operations are possible/remotely safe when the formation is flying in IMC.
Example: A two-ship flight of Cessna 172s is nearing their destination airport on an IFR flight plan. The airport's ATIS says to expect an ILS approach.
Can the formation shoot the ILS approach together, or do they need to breakup the formation and then get sequenced individually?
If the latter, when is the best time for the break to occur? (I'd assume either before or after you get handed off to Approach.)