What is the record for building a ship the fastest?

What is the record for building a ship the fastest?
When Henry J. Kaiser came up with the idea to replace welding with rivets, the Richmond Shipyard was able to turn out a ship a day, which used to take a month.


The fastest destroyer was built in a week.


Additional


Liberty ships were merchant ships produced during WW II. On average 3 of these finished production each day The average time to build them was 42 days nationally, and 2 weeks at Kaiser shipyards. The fastest Liberty ship build was the Robert E. Peary in 4 days, 15 hours, and 29 minutes as a publicity stunt. This was built at Kaiser's Richmond shipyard.