Lyric discussion by hans4 

Cover art for H.M.A.S Lookback lyrics by Amity Affliction, The

I think this song represents the crew of the ship HMAS feeling nostalgic about his voyaging times, He is in awe of the power and the beauty of the ocean, the tide and the view of the night sky at sea. One day, he falls into the water, and his final thoughts are of the sea engulfing him, making him part of what he loves, forever.

Amazing song, chills everytime.