Thunder Afloat

Screaming adventure with fighters of America's "Suicide Fleet!"

A tugboat captain serves under his rival as a U-boat chaser in World War I.

Wallace Beery

John Thorson

Chester Morris

'Rocky' Blake

Virginia Grey

Susan Thorson

Douglass Dumbrille

District Commander

Carl Esmond

U-Boat Captain

Clem Bevans

'Cap' Finch

John Qualen

Milo

Regis Toomey

Ives

Henry Victor

German U-Boat Officer

Addison Richards

Admiral Ross

Leon Ames

Recruiting Officer (uncredited)

Hans Joby

U-Boat Petty Officer

Arthur Belasco

Fisherman (uncredited)

Henry Hunter

Ensign Dyer

Joseph E. Bernard

Fisherman (uncredited)

Wade Boteler

Recruiting Officer (uncredited)

Jonathan Hale

Admiral Girard

Al Bridge

Fisherman (uncredited)