Originally posted by chikopek:
OC is usually LTA or CPT while CO is usually LTC.
Actually, the estab rank for OC appointment holders may range from WO to LTC, depending on the unit. For CO, it may be up to COL.
And another difference between OC and CO is their relative powers in disciplining soldiers.
An OC is a Junior Disciplinary Officer (JDO) and the max punishment that he can dish out to an enlistee after a summary trial is 10 days in DB.
Whereas a CO holds the appointment of a Senior Disciplinary Officer (SDO) and can lock up an enlistee in DB for up to 40 days.