The U.S. Navy's AM and ASR Ships

The USS Chewink was originally AM-39, which is Navy classification for minesweepers.  In 1929 it was overhauled and became ASR-3, Navy classification for submarine rescue ship.

A chewink is a bird species also known as towhee.

Both U.S. Navy mineweepers and submarine rescue ships are named after birds.

Now, You're Up On Your Navy Classifications.  --GreGen