Refers to a group of ships traveling or operating together, often for fishing, naval, or commercial purposes.
漁船団が港を出港した。
The fishing fleet left the harbor.
護衛艦が船団を守った。
The escort ship protected the convoy.
convoy of ships
Compound of 船 (ship) and 団 (group). The reading せんだん is the standard on'yomi combination.