Someone falls into the water from a dock. what is the proper sequence of actions to this person?

When someone falls into the water from a dock the proper sequence of actions to help this person is Reach, Throw, Row, Go.
Reach - you should reach the person (maybe you will need an object for assistance)
Throw- if you can not reach the person, throw some object that floats
Row - if you have a rowboat, ROW to the victim and pull the victim
Go- if you don'know to swim, go ans ask for help

No, they only protect against pregnancy.