Final answer:
The Navy cannot require a member to pay a private debt or deduct any part of their pay to reimburse a creditor.
Step-by-step explanation:
The Navy cannot require a member to pay a private debt or deduct any part of their pay to reimburse a creditor. This is because the U.S. Constitution in Section 4 states that the validity of the public debt of the United States shall not be questioned. It also prohibits the United States or any state from assuming or paying any debt or obligation incurred in aid of insurrection or rebellion. Therefore, the Navy cannot enforce private debts or deduct pay for that purpose.