。
Apparently there's a sightseeing boat running.
Literal
Sightseeing-boat [subject-が] depart-[ongoing-contracted-てる]-[hearsay-らしい]-[sentence-final-よ].
遊覧船 ('sightseeing/pleasure boat') is a compound: 遊覧 (sightseeing tour) + 船 (boat). 出てる is the contracted ~ている — 'is departing / is running [regularly].' らしい is the hearsay/conjectural evidential — 'it seems, apparently, I heard.' Used for information gathered from external sources.