1918 | August 1

Submarine assigned to assist with chaser crew training.
"Naval Attache Rome, cabled that Italian Government had placed Italian submarine Nautilus at our disposal for instruction purposes." (From: War Diary, Naval Base 25.) As the heat of summer wore on in Corfu, the submarine chaser crews were still training in the new science of antisubmarine warfare. To help the crews learn to use the listening devices more effectively, an Italian submarine was assigned to serve as a training target. The submarine would travel along a planned route, and chaser crews would report direction findings. 
Photo: From Hunters of the Steel Sharks: The Submarine Chasers of WWI, by Todd A. Woofenden.

Hunters of the Steel Sharks: The Submarine Chasers of WWI

Hunters of the Steel Sharks: The Submarine Chasers of WWI
Woofenden, 2006. Softcover, 224 pages. $23.95. Available on Amazon.com

In 1918, a war time fleet of 303 U.S. submarine chasers formed a new offensive against the enemy, armed with depth charges, deck guns and an array of new, top secret submarine detection and pursuit devices.

These miniature wooden war ships, the smallest commissioned vessels in the American navy, were the first major deployment mechanism for early antisubmarine warfare equipment, and were remarkable in their capabilities and service: Chasers crossed the Atlantic Ocean on their own power; performed submarine hunts and attacks from bases in Plymouth, Queenstown (Cobh) and Corfu; assisted with post-war diplomacy along the eastern shore of the Adriatic Sea; helped facilitate troop evacuation in northern Russia; and participated in the clearing of the North Sea mine barrage.

This is the history of the submarine chasers of the Great War, extensively illustrated with period photographs and diagrams, and rich with personal anecdotes, an up-close account of the early days of ASW based on rare, unpublished documents.