Answer:

surfaced

Answer	Crossword Clue
SURFACED	Opposite of "submerged"
SURFACED	Applied coating.
SURFACED	Came up, as a U-boat

SURFACED	Emerged from concealment
SURFACED	Came up for air

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.