LordsFire
Internet Wizard
One CIWS gun magazine holds 1550 rounds and is good for about 20.6 seconds of sustained fire at 4500 RPM. With manual aim, it takes a good 3 to 5 second burst to engage and destroy a speedboat in relatively calm seas.
Where did you come up with the 3-5 second number?
Also, why would they need to be manually aimed?