The majority of these costs are already paid. Certainly, there are logistical costs in moving material around, but if an active US Navy ship isn't deployed on

The majority of these costs are already paid. Certainly, there are logistical costs in moving material around, but if an active US Navy ship isn't deployed on a humanitarian mission it's either patrolling or training. It's still a sizable cost, but it'd be a lot less than expected if sunk expenditures were removed.