Final answer:
The second digit of an LDO or CWO Designator represents the functional group of the officer in the US Navy.
Step-by-step explanation:
The second digit of an LDO or CWO Designator represents the functional group of the officer in the US Navy. These designators are used to classify officers into different occupational fields and specialties.
For example, in the LDO Designator 63xx, the second digit '6' indicates the officer is in the Engineering/Technical field. Similarly, in the CWO Designator 77xx, the second digit '7' represents the C4I Systems field.
Each digit in the designators has a specific meaning and helps identify the specialization of the officer within their occupational field.