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"     Oceans are dangerous wildernesses, and plying them safely has always required the right equipment.   In July 1917, spurred by several high-profile tragedies at sea, including accidents and U-boat attacks, PM reported on a new design for davits, devices that lower lifeboats into the water on cables. A new system that lowered a lifeboat with metal crooks, &amp;quot;much as the arm of a moveable crane would,&amp;quot; allowed evacuation even if a ship was listing to the opposite side.   Recent maritime rescues like the Coast Guard&amp;#039;s high-tech adventure to save the Alaska Ranger (check out PM&amp;#039;s July cover story, now online in full) remind us that training and technology are still crucial to safety at sea. \u2014 Emily Masamitsu   RELATED STORIES \u2022 COVER STORY: The Coast Guard&amp;#039;s Most Extreme Rescue (With Video)  \u2022 PODCAST: The 21st Century Rules of Rescue Tech  \u2022 GALLERY: Browse 101+ Years of Classic PM Covers!   "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.popularmechanics.com/technology/gadgets/a3334/4270108/>