https://peertube.dngr.us/videos/watch/14850423-b845-4ee7-a979-db45f6b06acc Join this channel to get access to perks: https://www.youtube.com/channel/UCddem5RlB3bQe99wyY49g0g/join Want to learn more about Periscope Film and get access to exclusive swag? Join us on Patreon. Visit https://www.patreon.com/PeriscopeFilm Visit our website www.PeriscopeFilm.com “Mark 7, Mark 5 Barricades” is an unclassified film made by the U.S. Navy for training purposes. The film demonstrates how Mark 7 and Mark 5 barricades are used on aircraft carriers for planes in distress. The film trains the viewer on how to assemble the barricades using diagrams that illustrate how each part of the barricade functions amongst the other parts. Additionally, the film details how the power package works, which powers the stanchions on the aircraft carrier to raise and lower. 00:07 Unclassified 00:12 ‘For Official Use Only’ 00:18 Movie Credits: ‘United States Navy Training Film’ 00:30 Movie title: ‘The Mark 7, Mark 5 Barricades’ 00:35 View of a Douglas A-4 Skyhawk landing on a aircraft carrier 00:55 A Douglas A-4 Skyhawk flying 00:53 Two men running to and getting in an aircraft tractor 1:15 Men running on the aircraft preparing to rig the barricade 1:33 The aircraft in distress landing on the aircraft carrier 1:59 A Mark 7 barricade laid out and getting lifted into place 2:38 An illustrated diagram of the Mark 7 barricade with the dimensions annotated 2:46 An illustrated diagram of the five webbing assembly systems of the barricade 3:13 An illustrated diagram of the staggered engaging straps with arrows demonstrating how the load is distributed on them 3:44 A diagram of the barricade with arrows pointing to the two stanchions on either side of the barricade 4:02 An illustration of how the tensioning pendants are connected to the relief straps in the barricade 4:22 An illustration of how the extension loops in the barricade function in conjunction with the ring couplings 4:50 Illustration of how on the outboard side of the barricade the ring couplings connect with the pendants and purchase cable creating pretension 4:57 Illustration of the barricade with X’s on the four places the release straps break when the aircraft enters the barricade 5:35 Gloved hands attaching release straps to each support loop using a larks head knot 6:30 Hands attaching the release assembly to three canvas boot assembles and locking it properly 7:20 Two ends of the nylon extension loop being connected with a link and tightening it with a flathead screwdriver 7:46 Two men connecting the ends of the parallel pendent to the inboard and outboard ring coupling 7:54 A line of men folding the barricade for storage 8:06 Men carrying the barricade and stowing it in a hatch underneath the deck 1:08 A aircraft tractor pulling out the barricade 8:51 Two men unwinding the lower tensioning pendants from the deck wenches and attaching them to the lower webbing release assembles 9:00 A man tensioning the upper pendants using an air motor 9:31 A man making signals with his arms outstretched 9:43 A man pulling down the engine retracting lever 10:17 A diagram of the power package and all of its parts: the accumulator, a fluid storage tank, a pump and a motor controller 11:02 A diagram of how the power package functions within the aircraft carrier to raise and lower the stanchions 12:00 Diagram of the water levels in the accumulator rising and falling 12:21 Footage of the power package valve diagram from the Naval Air Engineering Laboratory 12:27 A man checking the valves of the power package 12:45 A man checking the fluid levels in the accumulator and the storage tank 13:20 A Weksler pressure gauge indicating the pressure level of the power package 14:06 The stanchions above deck being raised then lowered 14:45 Man greasing the wenches with graphite grease and the shaft of the base assembly with mineral grease 15:04 Diagram of the a barricade with the title ‘Mark-5 Barricade’ 15:18 Diagram showing how the Mark-5 barricade functions 15:58 A diagram showing how the nylon extension loops work in conjunction with wire rope loops and a coupling ring to create the necessary tension in the barricade 16:48 End credits: ‘Sea Power for Security’, The End Motion picture films don't last forever; many have already been lost or destroyed. For almost two decades, we've worked to collect, scan and preserve the world as it was captured on 35mm, 16mm and 8mm movies -- including home movies, industrial films, and other non-fiction. If you have endangered films you'd like to have scanned, or wish to donate celluloid to Periscope Film so that we can share them with the world, we'd love to hear from you. Contact us via the weblink below. This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com Source: https://www.youtube.com/watch?v=qjNNE5jd3-g Mirrored from Periscope Film (https://www.youtube.com/@PeriscopeFilm) Sat, 13 Jun 2026 05:49:08 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.dngr.us https://peertube.dngr.us/lazy-static/avatars/41a6fee9-7f57-42d0-a5fc-5db4f1af2e31.png https://peertube.dngr.us/videos/watch/14850423-b845-4ee7-a979-db45f6b06acc All rights reserved, unless otherwise specified in the terms specified at https://peertube.dngr.us/about and potential licenses granted by each content's rightholder.