Sea Devils (1937)

Brash young Coast Guardsman Mike O'Shay (Preston Foster) and much-decorated CPO 'Medals' Malone (Victor McLaughlin) hate each other even before they meet, and their enmity isn't helped by O'Shay's attraction to Doris (Ida Lupino), Medals' daughter. Medals has plans for Doris to marry officer's candidate Steve (Donald Woods), and does everything he can to keep Mike and Doris apart. When Steve is seriously injured on an iceberg demolition assignment because Malone and O'Shay are fighting, courts martial are in order. Malone swears he'll say anything to get O'Shay drummed out of the service, but whose story will the officers believe?