Answer: bodysurfs

AnswerCrossword Clue
BODYSURFSRides the waves, in a way
BODYSURFS1863 Vicksburg event
BODYSURFSDoesn't go overboard?
bodysurfsBODYSURF, to ride a wave without a surfboard
bodysurfsFloat on the crest of incoming waves without using a board