Bad stringers, safe to operate boat?

Joined
Aug 15, 2010
Location
east tennessee
Boat
1989 Klassic Thunderbolt 17.5 dual console,nissan 90
#1
Hey folks, hope all are well and blessed!
My boat floor/ stringers on passenger side appear to be rotten. Can I safely operate my boat with a new floor and modest repairs? If I use some type of plastic to replace the floor with, would this be a reasonably safe fix for a while? My transom is fine(great sound with a hammer test) , just the stringer being bad. I don't want to waste the time and $$ and the boat be unsafe.
Thanks and GOD bless all!!