How to Use Training Films: “Film Tactics” 1945 US Navy Training Film

US Navy Training Film playlist: https://www.youtube.com/playlist?list=PLA40407C12E5E35A7

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“EXPLAINS THROUGH DRAMATIZED EPISODES HOW TRAINING FILMS SHOULD & SHOULD NOT BE USED BY INSTRUCTORS & DEMONSTRATES SOME RESULTS OF GOOD & POOR TEACHING.”

US Navy Training Film MN-3731

Public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).

http://creativecommons.org/licenses/by-sa/3.0/
https://en.wikipedia.org/wiki/PT_boat

A PT boat (short for Patrol Torpedo boat) was a torpedo-armed fast attack craft used by the United States Navy in World War II. It was small, fast, and inexpensive to build, valued for its maneuverability and speed but hampered by ineffective torpedoes, limited armament, temperamental airplane engines, and comparatively fragile construction that limited it to coastal waters.

The PT boat was very different from the first generation of torpedo boat, which had been developed prior to World War I and featured a “displacement” hull. It rode low in the water, displaced up to 300 tons, and had a top speed of 25 to 27 kn (29 to 31 mph; 46 to 50 km/h). Instead, World War II PT boats exploited advances in planing hull design borrowed from offshore powerboat racing to reduce displacement to only 30–75 tons and increase top speed to 35 to 40 kn (40 to 46 mph; 65 to 74 km/h), with a corresponding improvement in mobility.

During World War II, PT boats engaged enemy warships, transports, tankers, barges, and sampans. As gunboats they could be effective against enemy small craft, especially armored barges used by the Japanese for inter-island transport.

Primary anti-ship armament was four 2,600 pound (1,179 kg) Mark 8 torpedoes. Launched by 21-inch Mark 18 (530 mm) torpedo tubes, each bore a 466-pound (211 kg) TNT warhead and had a range of 16,000 yards (14,630 m) at 36 knots (66 km/h). Two twin M2 .50 cal (12.7 mm) machine guns were mounted for anti-aircraft defense and general fire support. Some boats shipped a 20 mm Oerlikon cannon.

Propulsion was via a trio of modified Packard 3A-2500 V-12 derived aviation gasoline-fueled, liquid-cooled aircraft engines.

Nicknamed “the mosquito fleet” – and “devil boats” by the Japanese – the PT boat squadrons were heralded for their daring and earned a durable place in the public imagination that remains strong into the 21st century…

The Elco Naval Division boats were the longest of the three types of PT boats built for the Navy used during World War II. By war’s end, more of the Elco 80 ft (24 m) boats were built (326 in all) than any other type of motor torpedo boat. The 80-foot wooden-hulled craft were classified as boats in comparison with much larger steel-hulled destroyers, but were comparable in size to many wooden sailing ships in history. They had a 20 ft 8 in (6.30 m) beam. Though often said to be made of plywood, they were actually made of two diagonal layered 1 in (25 mm) thick mahogany planks, with a glue-impregnated layer of canvas in between. Holding all this together were thousands of bronze screws and copper rivets. This type of construction made it possible for damage to the wooden hulls of these boats to be easily repaired at the front lines by base force personnel. Five Elco Boats were manufactured in knock-down kit form and sent to Long Beach Boatworks for assembly on the West Coast as part of an experiment and as a proof of concept…

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