one's own ship; privately owned vessel
Refers to a ship that one owns or operates personally, often in contrast to a chartered or company vessel.
彼は持ち船で世界中を旅している。
He travels the world on his own ship.
Compound of 持ち (mochi, 'holding, owning') + 船 (fune, 'ship'), with rendaku voicing to ぶね.