Re-program a mobile radio for VHF Marine Band?

I own a Kenwood TK-7100 VHF mobile radio right now, and I would like to use it in my new boat.

Is it possible to have the radio channels reprogrammed so I can use it as a VHF Marine Band radio?

I don’t know if I should resell the transceiver and go buy one that is made specifically for that purpose.

Which is the best way to go?

Do I need an FCC ship station license for a Marine radio?