Ok guys, I've done some testing.
1. It appears there are 3 classes for strobes:
2. Only weapons that have NVGlock=1 seem to be able to lock them.
IR Strobe IRStrobe (target strobe - not throwable)
IR Strobe Marker IR_Strobe_Marker (marker strobe - throwable)
IR Strobe Target IR_Strobe_Target (target strobe - throwable)
Only missile I've found so far is the GBU-12 (LGB) launched from this aircraft:
3. There seems to be a bug: both marker strobe and target strobe can be locked by aircraft (they both appear as Laser targets).
4. Now I wonder why the manual says:
Machine guns can't lock anything! And if rockets are not guided then how will they acquire target?
The Target strobe can be targeted by vehicles and aircraft
(machineguns, unguided rockets
); it can be used for marking tagets at night.