{"id":110792,"date":"2021-02-23T12:30:19","date_gmt":"2021-02-23T17:30:19","guid":{"rendered":"https:\/\/valorguardians.com\/blog\/?p=110792"},"modified":"2021-02-23T11:31:36","modified_gmt":"2021-02-23T16:31:36","slug":"analysis-of-maneuvers","status":"publish","type":"post","link":"https:\/\/www.azuse.cloud\/?p=110792","title":{"rendered":"Analysis of Maneuvers"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-70138\" src=\"https:\/\/www.azuse.cloud\/wp-content\/uploads\/2017\/02\/Mergansers-at-IBSP-north-4-20-2013-300x188.jpg\" alt=\"\" width=\"321\" height=\"201\" srcset=\"https:\/\/www.azuse.cloud\/wp-content\/uploads\/2017\/02\/Mergansers-at-IBSP-north-4-20-2013-300x188.jpg 300w, https:\/\/www.azuse.cloud\/wp-content\/uploads\/2017\/02\/Mergansers-at-IBSP-north-4-20-2013-768x481.jpg 768w, https:\/\/www.azuse.cloud\/wp-content\/uploads\/2017\/02\/Mergansers-at-IBSP-north-4-20-2013-500x313.jpg 500w\" sizes=\"auto, (max-width: 321px) 100vw, 321px\" \/><\/p>\n<p>The following is our very own AW1Ed\u2019s assessment of the various and sundry scenes in that classic and very boisterous movie \u201cDown Periscope\u201d. It is available on demand now, and if you&#8217;re still stuck indoors and need a good laugh, the movie will do it for you.<\/p>\n<p>You may remember this scene, where CAPT Dodge orders the crew to bottom out the boat.\u00a0 See comment re: below thermal layer for more info. The attempt to fool the hunter sub is not unusual.<\/p>\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=OEpEv6kWdtw\">https:\/\/www.youtube.com\/watch?v=OEpEv6kWdtw<\/a><\/p>\n<p>&nbsp;<\/p>\n<p>Per AW1Ed: \u00a0\u00a0Peel back the comedy and there is some very real use of actual submarine\u00a0tactics. Ribbon racks looked good, too- they had some good Navy consultants\u00a0on the set,\u00a0Village People notwithstanding.\u00a0 Here&#8217;s what I saw:<\/p>\n<p>-The taut string bows with the compression of the sub&#8217;s hull as it dives. This is quite true, and described to me by more than one of my fellow AW&#8217;s who cross-decked on a sub for a few days. I passed on the opportunity.<\/p>\n<p>-&#8220;Not a diesel not a sub.&#8221;\u00a0 BS comment. Every naval sub has a diesel engine, either as an auxiliary\u00a0or prime mover, and the sub skipper would know this.<\/p>\n<p>-Deceptive\u00a0Lighting is an old tactic, not so useful these days of IR cameras that see in the dark. But a valid tactic nonetheless.<\/p>\n<p>-Harbor Attack(s) go back to WW-II with U-Boats entering\u00a0Scappa Flow and really hurting the Brits, for example. Ours entered Tokyo Bay to attack\u00a0the Japanese fleet.<\/p>\n<p>-P-3! Sub dives to go below the thermal layer to\u00a0avoid P-3&#8217;s sonar. This is where subs want to be- on the opposite\u00a0side of the layer from our sensors.<\/p>\n<p>-Bottoming- another\u00a0common tactic, in the right areas. Sit on the bottom, make popcorn and watch a movie while everyone\u00a0goes nuts looking. Bastards.<\/p>\n<p>-Deceptive Acoustics. Not quite the way depicted. Subs carry false targets that mimic their\u00a0acoustic signature, to draw ASW folks off the scent.<\/p>\n<p>-Breaking Exercise Rules. If I had a nickel\u00a0every time THIS happened&#8230;<\/p>\n<p>-P-3! Good to see the old girl flying. That&#8217;s all.<\/p>\n<p>-Merchant Masking. (Sub hides in the merchant ship&#8217;s cavitation.) Ridiculous scene for so many reasons. The reality is subs will trail or otherwise use merchants to confuse the sonar picture. Saw this one often, and never got fooled.<\/p>\n<p>-Star Wars. Politics at Flag level, who&#8217;da thunk it? *grin*<\/p>\n<p>So there you are, and not a sub CO or XO in sight.<\/p>\n<p>All I can say is, thanks, AW1Ed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The following is our very own AW1Ed\u2019s assessment of the various and sundry scenes in that &hellip; <a title=\"Analysis of Maneuvers\" class=\"hm-read-more\" href=\"https:\/\/www.azuse.cloud\/?p=110792\"><span class=\"screen-reader-text\">Analysis of Maneuvers<\/span>Read more<\/a><\/p>\n","protected":false},"author":653,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[119],"tags":[],"class_list":["post-110792","post","type-post","status-publish","format-standard","hentry","category-navy"],"_links":{"self":[{"href":"https:\/\/www.azuse.cloud\/index.php?rest_route=\/wp\/v2\/posts\/110792","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.azuse.cloud\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.azuse.cloud\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.azuse.cloud\/index.php?rest_route=\/wp\/v2\/users\/653"}],"replies":[{"embeddable":true,"href":"https:\/\/www.azuse.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=110792"}],"version-history":[{"count":1,"href":"https:\/\/www.azuse.cloud\/index.php?rest_route=\/wp\/v2\/posts\/110792\/revisions"}],"predecessor-version":[{"id":110793,"href":"https:\/\/www.azuse.cloud\/index.php?rest_route=\/wp\/v2\/posts\/110792\/revisions\/110793"}],"wp:attachment":[{"href":"https:\/\/www.azuse.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=110792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.azuse.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=110792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.azuse.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=110792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}