海洋 かいよう哨戒 しょうかい じゃありませんでした
kaiyō shōka ikija arimasendeshita

Noun
Desu Copula

The polite, past negative form of 海洋哨戒機

1. Was not a maritime patrol aircraft.; It was not a maritime patrol aircraft.

Past/Perfective
Negative
Polite
Terminal Form