上陸 じょうりく よう舟艇 しゅうていでしょう
jōrikuyō shūteideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 上陸用舟艇

1. Landing craft, likely.; Probably an amphibious vehicle.

Polite
Presumptive
Conjecture