How you know CASA FOI's are at your local aerodrome conducting ramp checks etc:
1. Normally a twin engine aircraft will arrive in the circuit area unannounced because the FOI flying forget to broadcast on that CTAF thingy, or used the wrong frequency,
2. FOI most likely will fly some strange circuit direction that does not appear in the ERSA
3. Centre will be calling some aircraft trying to get them to cancel SAR ,
4. Ramp Checks will only be conducted between 9am and 4.30 pm, and not between the hours of 11.45 am and 13.15 pm to allow for lunch break etc,
5. Just remember most CASA FOI's are good blokes who are just doing their job, but unfortunately a few are legends in their own lunch boxes or couldn't hold a job down in GA, or just like to be smart p****ks or have a high opinion of themselves.