They do cover it if...
It prevents a more expensive tow to your slip.
We can do it safely. This is our call on scene. More fouled props are covered upriver (Delta) than down in the Bay as weather, current, and traffic conditions can make the situation too risky.
If it is just line and not chain or cable.
They do not cover it if you are in your slip at the time.
We charge VA-BUS $150 plus run time for covered situations.