[central_va]

The simple answer is you stay offshore at the maximum range of the threat until the ASM missile threat is neutralized. If the range is 1,000 NM then stay that for away. At 1,000 nm you get a 1 1/2hour (90 minutes) warning. You've never been in the Navy have you?

[minnesota_bound]

Don’t need to be to know missiles are much faster then any ship.
The Navy fired 60 at a single runway in the article I linked to. How many do you think our enemies will fire to sink our ships. As many as needed.