( ! ) Warning: Array to string conversion in C:\wamp64\www\lib\page\SpotPage_editspot.php on line 39
Call Stack
#	Time	Memory	Function	Location
1	0.0001	366264	{main}( )	...\index.php:0
2	0.0106	668424	SpotPage_editspot->render( )	...\index.php:327
3	0.0169	765024	str_replace( $search = '[br]', $replace = '\n', $subject = ['category' => '0', 'website' => 'http://history.navy.mil/library/online/onipubno44.htm', 'image' => 'http://history.navy.mil/pics/onipub44_cvr.jpg', 'sabnzbdurl' => '', 'messageid' => 'cVhabEhZ2iBUtswDxiPelw.XwnsaYtLK4WJHCwaC1Fkw@free.pt', 'searchurl' => '', 'description' => 'voor de liefhebbers van submarine tactics :)<br /><br />GERMAN SUBMARINE ATTACKS<br /><br />By Lieut. Com. H. H. FROST, United States Navy.<br /><br />In considering methods of avoiding submarine attacks and of counter attacking submarines after a submarine attack has been made, it is absolutely necessary that the various methods which the enemy uses in making submarine attacks be clearly understood. The German instructions "Torpedo firing from submarines," O. N. I. publication No. 37, give a great quantity'..., 'sub' => '', 'filesize' => '0', 'poster' => 'srerren', 'tag' => 'submarines', 'nzb' => [], 'title' => 'German Submarine Attacks (ONI Nr44)', 'filename' => 'German Submarine Attacks', 'newsgroup' => '', 'subcata' => 'a5\|', 'subcatb' => 'b5\|', 'subcatc' => 'c0\|', 'subcatd' => 'd6\|', 'subcatz' => 'z2\|', 'created' => '1261080499', 'key' => '', 'prevMsgids' => [], 'newsreader' => '', 'id' => '42741', 0 => '42741', 1 => 'cVhabEhZ2iBUtswDxiPelw.XwnsaYtLK4WJHCwaC1Fkw@free.pt', 2 => '0', 3 => 'srerren', 4 => 'a5\|', 5 => 'b5\|', 6 => 'c0\|', 7 => 'd6\|', 8 => 'z2\|', 9 => 'German Submarine Attacks (ONI Nr44)', 10 => 'submarines', 'stamp' => '1270691951', 11 => '1270691951', 'moderated' => NULL, 12 => NULL, 'rating' => '0', 13 => '0', 'commentcount' => '0', 14 => '0', 'reportcount' => '0', 15 => '0', 16 => '0', 'spotterid' => '', 17 => '', 'editstamp' => NULL, 18 => NULL, 'editor' => NULL, 19 => NULL, 'downloadstamp' => NULL, 20 => NULL, 'watchstamp' => NULL, 21 => NULL, 'seenstamp' => NULL, 22 => NULL, 'verified' => '0', 23 => '0', 'user-signature' => '', 24 => '', 'user-key' => 'YToyOntzOjg6ImV4cG9uZW50IjtzOjA6IiI7czo2OiJtb2R1bG8iO3M6MDoiIjt9', 25 => 'YToyOntzOjg6ImV4cG9uZW50IjtzOjA6IiI7czo2OiJtb2R1bG8iO3M6MDoiIjt9', 'xml-signature' => '', 26 => '', 'fullxml' => '<SpotNet><Posting><ID>1147823</ID><Created>1261080499</Created><Title><![CDATA[German Submarine Attacks (ONI Nr44)]]></Title><Poster><![CDATA[srerren]]></Poster><Website><![CDATA[http://history.navy.mil/library/online/onipubno44.htm]]></Website><Newsgroup>alt.binaries.e-book.technical</Newsgroup><Filename><![CDATA[German Submarine Attacks]]></Filename><Description><![CDATA[voor de liefhebbers van submarine tactics :)<br /><br />GERMAN SUBMARINE ATTACKS<br /><br />By Lieut. Com. H. H. FROST, United States Na'..., 27 => '<SpotNet><Posting><ID>1147823</ID><Created>1261080499</Created><Title><![CDATA[German Submarine Attacks (ONI Nr44)]]></Title><Poster><![CDATA[srerren]]></Poster><Website><![CDATA[http://history.navy.mil/library/online/onipubno44.htm]]></Website><Newsgroup>alt.binaries.e-book.technical</Newsgroup><Filename><![CDATA[German Submarine Attacks]]></Filename><Description><![CDATA[voor de liefhebbers van submarine tactics :)<br /><br />GERMAN SUBMARINE ATTACKS<br /><br />By Lieut. Com. H. H. FROST, United States Na'..., 'listidtype' => NULL, 28 => NULL] )	...\SpotPage_editspot.php:39

( ! ) Warning: Array to string conversion in C:\wamp64\www\lib\page\SpotPage_editspot.php on line 39

Call Stack

Time

Memory

Function

Location

0.0001

366264

{main}( )

...\index.php:0

0.0106

668424

SpotPage_editspot->render( )

...\index.php:327

0.0169

765024

str_replace( $search = '[br]', $replace = '\n', $subject = ['category' => '0', 'website' => 'http://history.navy.mil/library/online/onipubno44.htm', 'image' => 'http://history.navy.mil/pics/onipub44_cvr.jpg', 'sabnzbdurl' => '', 'messageid' => 'cVhabEhZ2iBUtswDxiPelw.XwnsaYtLK4WJHCwaC1Fkw@free.pt', 'searchurl' => '', 'description' => 'voor de liefhebbers van submarine tactics :) GERMAN SUBMARINE ATTACKS By Lieut. Com. H. H. FROST, United States Navy. In considering methods of avoiding submarine attacks and of counter attacking submarines after a submarine attack has been made, it is absolutely necessary that the various methods which the enemy uses in making submarine attacks be clearly understood. The German instructions "Torpedo firing from submarines," O. N. I. publication No. 37, give a great quantity'..., 'sub' => '', 'filesize' => '0', 'poster' => 'srerren', 'tag' => 'submarines', 'nzb' => [], 'title' => 'German Submarine Attacks (ONI Nr44)', 'filename' => 'German Submarine Attacks', 'newsgroup' => '', 'subcata' => 'a5|', 'subcatb' => 'b5|', 'subcatc' => 'c0|', 'subcatd' => 'd6|', 'subcatz' => 'z2|', 'created' => '1261080499', 'key' => '', 'prevMsgids' => [], 'newsreader' => '', 'id' => '42741', 0 => '42741', 1 => 'cVhabEhZ2iBUtswDxiPelw.XwnsaYtLK4WJHCwaC1Fkw@free.pt', 2 => '0', 3 => 'srerren', 4 => 'a5|', 5 => 'b5|', 6 => 'c0|', 7 => 'd6|', 8 => 'z2|', 9 => 'German Submarine Attacks (ONI Nr44)', 10 => 'submarines', 'stamp' => '1270691951', 11 => '1270691951', 'moderated' => NULL, 12 => NULL, 'rating' => '0', 13 => '0', 'commentcount' => '0', 14 => '0', 'reportcount' => '0', 15 => '0', 16 => '0', 'spotterid' => '', 17 => '', 'editstamp' => NULL, 18 => NULL, 'editor' => NULL, 19 => NULL, 'downloadstamp' => NULL, 20 => NULL, 'watchstamp' => NULL, 21 => NULL, 'seenstamp' => NULL, 22 => NULL, 'verified' => '0', 23 => '0', 'user-signature' => '', 24 => '', 'user-key' => 'YToyOntzOjg6ImV4cG9uZW50IjtzOjA6IiI7czo2OiJtb2R1bG8iO3M6MDoiIjt9', 25 => 'YToyOntzOjg6ImV4cG9uZW50IjtzOjA6IiI7czo2OiJtb2R1bG8iO3M6MDoiIjt9', 'xml-signature' => '', 26 => '', 'fullxml' => '<SpotNet><Posting><ID>1147823</ID><Created>1261080499</Created><Title><![CDATA[German Submarine Attacks (ONI Nr44)]]></Title><Poster><![CDATA[srerren]]></Poster><Website><![CDATA[http://history.navy.mil/library/online/onipubno44.htm]]></Website><Newsgroup>alt.binaries.e-book.technical</Newsgroup><Filename><![CDATA[German Submarine Attacks]]></Filename><Description><![CDATA[voor de liefhebbers van submarine tactics :) GERMAN SUBMARINE ATTACKS By Lieut. Com. H. H. FROST, United States Na'..., 27 => '<SpotNet><Posting><ID>1147823</ID><Created>1261080499</Created><Title><![CDATA[German Submarine Attacks (ONI Nr44)]]></Title><Poster><![CDATA[srerren]]></Poster><Website><![CDATA[http://history.navy.mil/library/online/onipubno44.htm]]></Website><Newsgroup>alt.binaries.e-book.technical</Newsgroup><Filename><![CDATA[German Submarine Attacks]]></Filename><Description><![CDATA[voor de liefhebbers van submarine tactics :) GERMAN SUBMARINE ATTACKS By Lieut. Com. H. H. FROST, United States Na'..., 'listidtype' => NULL, 28 => NULL] )

...\SpotPage_editspot.php:39

( ! ) Warning: Array to string conversion in C:\wamp64\www\lib\page\SpotPage_editspot.php on line 39
Call Stack
#	Time	Memory	Function	Location
1	0.0001	366264	{main}( )	...\index.php:0
2	0.0106	668424	SpotPage_editspot->render( )	...\index.php:327
3	0.0169	765024	str_replace( $search = '[br]', $replace = '\n', $subject = ['category' => '0', 'website' => 'http://history.navy.mil/library/online/onipubno44.htm', 'image' => 'http://history.navy.mil/pics/onipub44_cvr.jpg', 'sabnzbdurl' => '', 'messageid' => 'cVhabEhZ2iBUtswDxiPelw.XwnsaYtLK4WJHCwaC1Fkw@free.pt', 'searchurl' => '', 'description' => 'voor de liefhebbers van submarine tactics :)<br /><br />GERMAN SUBMARINE ATTACKS<br /><br />By Lieut. Com. H. H. FROST, United States Navy.<br /><br />In considering methods of avoiding submarine attacks and of counter attacking submarines after a submarine attack has been made, it is absolutely necessary that the various methods which the enemy uses in making submarine attacks be clearly understood. The German instructions "Torpedo firing from submarines," O. N. I. publication No. 37, give a great quantity'..., 'sub' => '', 'filesize' => '0', 'poster' => 'srerren', 'tag' => 'submarines', 'nzb' => [], 'title' => 'German Submarine Attacks (ONI Nr44)', 'filename' => 'German Submarine Attacks', 'newsgroup' => '', 'subcata' => 'a5\|', 'subcatb' => 'b5\|', 'subcatc' => 'c0\|', 'subcatd' => 'd6\|', 'subcatz' => 'z2\|', 'created' => '1261080499', 'key' => '', 'prevMsgids' => [], 'newsreader' => '', 'id' => '42741', 0 => '42741', 1 => 'cVhabEhZ2iBUtswDxiPelw.XwnsaYtLK4WJHCwaC1Fkw@free.pt', 2 => '0', 3 => 'srerren', 4 => 'a5\|', 5 => 'b5\|', 6 => 'c0\|', 7 => 'd6\|', 8 => 'z2\|', 9 => 'German Submarine Attacks (ONI Nr44)', 10 => 'submarines', 'stamp' => '1270691951', 11 => '1270691951', 'moderated' => NULL, 12 => NULL, 'rating' => '0', 13 => '0', 'commentcount' => '0', 14 => '0', 'reportcount' => '0', 15 => '0', 16 => '0', 'spotterid' => '', 17 => '', 'editstamp' => NULL, 18 => NULL, 'editor' => NULL, 19 => NULL, 'downloadstamp' => NULL, 20 => NULL, 'watchstamp' => NULL, 21 => NULL, 'seenstamp' => NULL, 22 => NULL, 'verified' => '0', 23 => '0', 'user-signature' => '', 24 => '', 'user-key' => 'YToyOntzOjg6ImV4cG9uZW50IjtzOjA6IiI7czo2OiJtb2R1bG8iO3M6MDoiIjt9', 25 => 'YToyOntzOjg6ImV4cG9uZW50IjtzOjA6IiI7czo2OiJtb2R1bG8iO3M6MDoiIjt9', 'xml-signature' => '', 26 => '', 'fullxml' => '<SpotNet><Posting><ID>1147823</ID><Created>1261080499</Created><Title><![CDATA[German Submarine Attacks (ONI Nr44)]]></Title><Poster><![CDATA[srerren]]></Poster><Website><![CDATA[http://history.navy.mil/library/online/onipubno44.htm]]></Website><Newsgroup>alt.binaries.e-book.technical</Newsgroup><Filename><![CDATA[German Submarine Attacks]]></Filename><Description><![CDATA[voor de liefhebbers van submarine tactics :)<br /><br />GERMAN SUBMARINE ATTACKS<br /><br />By Lieut. Com. H. H. FROST, United States Na'..., 27 => '<SpotNet><Posting><ID>1147823</ID><Created>1261080499</Created><Title><![CDATA[German Submarine Attacks (ONI Nr44)]]></Title><Poster><![CDATA[srerren]]></Poster><Website><![CDATA[http://history.navy.mil/library/online/onipubno44.htm]]></Website><Newsgroup>alt.binaries.e-book.technical</Newsgroup><Filename><![CDATA[German Submarine Attacks]]></Filename><Description><![CDATA[voor de liefhebbers van submarine tactics :)<br /><br />GERMAN SUBMARINE ATTACKS<br /><br />By Lieut. Com. H. H. FROST, United States Na'..., 'listidtype' => NULL, 28 => NULL] )	...\SpotPage_editspot.php:39

( ! ) Warning: Array to string conversion in C:\wamp64\www\lib\page\SpotPage_editspot.php on line 39

Call Stack

Time

Memory

Function

Location

0.0001

366264

{main}( )

...\index.php:0

0.0106

668424

SpotPage_editspot->render( )

...\index.php:327

0.0169

765024

...\SpotPage_editspot.php:39

( ! ) Warning: Cannot modify header information - headers already sent by (output started at C:\wamp64\www\lib\page\SpotPage_editspot.php:39) in C:\wamp64\www\lib\page\SpotPage_Abs.php on line 63
Call Stack
#	Time	Memory	Function	Location
1	0.0001	366264	{main}( )	...\index.php:0
2	0.0106	668424	SpotPage_editspot->render( )	...\index.php:327
3	0.0226	766288	SpotPage_Abs->template( $tpl = 'editspot', $params = ['editspotform' => ['category' => '0', 'website' => 'http://history.navy.mil/library/online/onipubno44.htm', 'image' => 'http://history.navy.mil/pics/onipub44_cvr.jpg', 'sabnzbdurl' => '', 'messageid' => 'cVhabEhZ2iBUtswDxiPelw.XwnsaYtLK4WJHCwaC1Fkw@free.pt', 'searchurl' => '', 'description' => 'voor de liefhebbers van submarine tactics :)<br /><br />GERMAN SUBMARINE ATTACKS<br /><br />By Lieut. Com. H. H. FROST, United States Navy.<br /><br />In considering methods of avoiding submarine attacks and of counter attacking submarines after a submarine attack has been made, it is absolutely necessary that the various methods which the enemy uses in making submarine attacks be clearly understood. The German instructions "Torpedo firing from submarines," O. N. I. publication No. 37, give a great quantity'..., 'sub' => '', 'filesize' => '0', 'poster' => 'srerren', 'tag' => 'submarines', 'nzb' => 'Array', 'title' => 'German Submarine Attacks (ONI Nr44)', 'filename' => 'German Submarine Attacks', 'newsgroup' => '', 'subcata' => 'a5\|', 'subcatb' => 'b5\|', 'subcatc' => 'c0\|', 'subcatd' => 'd6\|', 'subcatz' => 'z2\|', 'created' => '1261080499', 'key' => '', 'prevMsgids' => 'Array', 'newsreader' => '', 'id' => '42741', 0 => '42741', 1 => 'cVhabEhZ2iBUtswDxiPelw.XwnsaYtLK4WJHCwaC1Fkw@free.pt', 2 => '0', 3 => 'srerren', 4 => 'a5\|', 5 => 'b5\|', 6 => 'c0\|', 7 => 'd6\|', 8 => 'z2\|', 9 => 'German Submarine Attacks (ONI Nr44)', 10 => 'submarines', 'stamp' => '1270691951', 11 => '1270691951', 'moderated' => '', 12 => '', 'rating' => '0', 13 => '0', 'commentcount' => '0', 14 => '0', 'reportcount' => '0', 15 => '0', 16 => '0', 'spotterid' => '', 17 => '', 'editstamp' => '', 18 => '', 'editor' => '', 19 => '', 'downloadstamp' => '', 20 => '', 'watchstamp' => '', 21 => '', 'seenstamp' => '', 22 => '', 'verified' => '0', 23 => '0', 'user-signature' => '', 24 => '', 'user-key' => 'YToyOntzOjg6ImV4cG9uZW50IjtzOjA6IiI7czo2OiJtb2R1bG8iO3M6MDoiIjt9', 25 => 'YToyOntzOjg6ImV4cG9uZW50IjtzOjA6IiI7czo2OiJtb2R1bG8iO3M6MDoiIjt9', 'xml-signature' => '', 26 => '', 'fullxml' => '<SpotNet><Posting><ID>1147823</ID><Created>1261080499</Created><Title><![CDATA[German Submarine Attacks (ONI Nr44)]]></Title><Poster><![CDATA[srerren]]></Poster><Website><![CDATA[http://history.navy.mil/library/online/onipubno44.htm]]></Website><Newsgroup>alt.binaries.e-book.technical</Newsgroup><Filename><![CDATA[German Submarine Attacks]]></Filename><Description><![CDATA[voor de liefhebbers van submarine tactics :)<br /><br />GERMAN SUBMARINE ATTACKS<br /><br />By Lieut. Com. H. H. FROST, United States Na'..., 27 => '<SpotNet><Posting><ID>1147823</ID><Created>1261080499</Created><Title><![CDATA[German Submarine Attacks (ONI Nr44)]]></Title><Poster><![CDATA[srerren]]></Poster><Website><![CDATA[http://history.navy.mil/library/online/onipubno44.htm]]></Website><Newsgroup>alt.binaries.e-book.technical</Newsgroup><Filename><![CDATA[German Submarine Attacks]]></Filename><Description><![CDATA[voor de liefhebbers van submarine tactics :)<br /><br />GERMAN SUBMARINE ATTACKS<br /><br />By Lieut. Com. H. H. FROST, United States Na'..., 'listidtype' => '', 28 => ''], 'result' => class Dto_FormResult { public $_result = 'notsubmitted'; public $_data = [...]; public $_errors = [...]; public $_warnings = [...]; public $_info = [...] }] )	...\SpotPage_editspot.php:87
4	0.0226	766760	SpotPage_Abs->sendExpireHeaders( $preventCaching = TRUE )	...\SpotPage_Abs.php:139
5	0.0226	766760	header( $header = 'Cache-Control: private, post-check=1, pre-check=2, max-age=1, must-revalidate' )	...\SpotPage_Abs.php:63

( ! ) Warning: Cannot modify header information - headers already sent by (output started at C:\wamp64\www\lib\page\SpotPage_editspot.php:39) in C:\wamp64\www\lib\page\SpotPage_Abs.php on line 63

Call Stack

Time

Memory

Function

Location

0.0001

366264

{main}( )

...\index.php:0

0.0106

668424

SpotPage_editspot->render( )

...\index.php:327

0.0226

766288

SpotPage_Abs->template( $tpl = 'editspot', $params = ['editspotform' => ['category' => '0', 'website' => 'http://history.navy.mil/library/online/onipubno44.htm', 'image' => 'http://history.navy.mil/pics/onipub44_cvr.jpg', 'sabnzbdurl' => '', 'messageid' => 'cVhabEhZ2iBUtswDxiPelw.XwnsaYtLK4WJHCwaC1Fkw@free.pt', 'searchurl' => '', 'description' => 'voor de liefhebbers van submarine tactics :) GERMAN SUBMARINE ATTACKS By Lieut. Com. H. H. FROST, United States Navy. In considering methods of avoiding submarine attacks and of counter attacking submarines after a submarine attack has been made, it is absolutely necessary that the various methods which the enemy uses in making submarine attacks be clearly understood. The German instructions "Torpedo firing from submarines," O. N. I. publication No. 37, give a great quantity'..., 'sub' => '', 'filesize' => '0', 'poster' => 'srerren', 'tag' => 'submarines', 'nzb' => 'Array', 'title' => 'German Submarine Attacks (ONI Nr44)', 'filename' => 'German Submarine Attacks', 'newsgroup' => '', 'subcata' => 'a5|', 'subcatb' => 'b5|', 'subcatc' => 'c0|', 'subcatd' => 'd6|', 'subcatz' => 'z2|', 'created' => '1261080499', 'key' => '', 'prevMsgids' => 'Array', 'newsreader' => '', 'id' => '42741', 0 => '42741', 1 => 'cVhabEhZ2iBUtswDxiPelw.XwnsaYtLK4WJHCwaC1Fkw@free.pt', 2 => '0', 3 => 'srerren', 4 => 'a5|', 5 => 'b5|', 6 => 'c0|', 7 => 'd6|', 8 => 'z2|', 9 => 'German Submarine Attacks (ONI Nr44)', 10 => 'submarines', 'stamp' => '1270691951', 11 => '1270691951', 'moderated' => '', 12 => '', 'rating' => '0', 13 => '0', 'commentcount' => '0', 14 => '0', 'reportcount' => '0', 15 => '0', 16 => '0', 'spotterid' => '', 17 => '', 'editstamp' => '', 18 => '', 'editor' => '', 19 => '', 'downloadstamp' => '', 20 => '', 'watchstamp' => '', 21 => '', 'seenstamp' => '', 22 => '', 'verified' => '0', 23 => '0', 'user-signature' => '', 24 => '', 'user-key' => 'YToyOntzOjg6ImV4cG9uZW50IjtzOjA6IiI7czo2OiJtb2R1bG8iO3M6MDoiIjt9', 25 => 'YToyOntzOjg6ImV4cG9uZW50IjtzOjA6IiI7czo2OiJtb2R1bG8iO3M6MDoiIjt9', 'xml-signature' => '', 26 => '', 'fullxml' => '<SpotNet><Posting><ID>1147823</ID><Created>1261080499</Created><Title><![CDATA[German Submarine Attacks (ONI Nr44)]]></Title><Poster><![CDATA[srerren]]></Poster><Website><![CDATA[http://history.navy.mil/library/online/onipubno44.htm]]></Website><Newsgroup>alt.binaries.e-book.technical</Newsgroup><Filename><![CDATA[German Submarine Attacks]]></Filename><Description><![CDATA[voor de liefhebbers van submarine tactics :) GERMAN SUBMARINE ATTACKS By Lieut. Com. H. H. FROST, United States Na'..., 27 => '<SpotNet><Posting><ID>1147823</ID><Created>1261080499</Created><Title><![CDATA[German Submarine Attacks (ONI Nr44)]]></Title><Poster><![CDATA[srerren]]></Poster><Website><![CDATA[http://history.navy.mil/library/online/onipubno44.htm]]></Website><Newsgroup>alt.binaries.e-book.technical</Newsgroup><Filename><![CDATA[German Submarine Attacks]]></Filename><Description><![CDATA[voor de liefhebbers van submarine tactics :) GERMAN SUBMARINE ATTACKS By Lieut. Com. H. H. FROST, United States Na'..., 'listidtype' => '', 28 => ''], 'result' => class Dto_FormResult { public $_result = 'notsubmitted'; public $_data = [...]; public $_errors = [...]; public $_warnings = [...]; public $_info = [...] }] )

...\SpotPage_editspot.php:87

0.0226

766760

SpotPage_Abs->sendExpireHeaders( $preventCaching = TRUE )

...\SpotPage_Abs.php:139

0.0226

766760

header( $header = 'Cache-Control: private, post-check=1, pre-check=2, max-age=1, must-revalidate' )

...\SpotPage_Abs.php:63

( ! ) Warning: Cannot modify header information - headers already sent by (output started at C:\wamp64\www\lib\page\SpotPage_editspot.php:39) in C:\wamp64\www\lib\page\SpotPage_Abs.php on line 64
Call Stack
#	Time	Memory	Function	Location
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voor de liefhebbers van submarine tactics :) GERMAN SUBMARINE ATTACKS By Lieut. Com. H. H. FROST, United States Navy. In considering methods of avoiding submarine attacks and of counter attacking submarines after a submarine attack has been made, it is absolutely necessary that the various methods which the enemy uses in making submarine attacks be clearly understood. The German instructions "Torpedo firing from submarines," O. N. I. publication No. 37, give a great quantity of valuable information, but this is hardly arranged in such a manner that it can be readily understood. It is my purpose to do this. I. THE GERMAN SUBMARINE ATTACK IN GENERAL. 1. The attack is not possible if the submarine is more than three points on the bow of the target when it is first sighted, unless the target is at such a great distance that the submarine can proceed for some time on the surface. If a smoke or the tops of the masts of a vessel are sighted, the submarine proceeds at high speed on the surface, using oil engines, toward a position ahead of the vessel until its tops are sighted. 2. Then the submarine submerges so that it will not be discovered by the lookouts in the tops. If at this time it is still a considerable distance from the course of the target, it submerges to 59 feet, lowers periscope and proceeds at full speed or utmost speed (respectively 7 and about 9 knots) so as to make sure of getting in an attack. It frequently rises and raises its periscope--without special care to prevent being seen--so that its position with reference to the target and the latter's course and speed can be determined. 3. When a range of 4,000 meters is reached, the submarine takes special care to remain unseen. From this time on--unless high speed is necessary to reach the target--slow speed (4 knots) is the normal speed. The submarine runs at such a depth that its periscope when lowered is about 1 meter below the surface. At short intervals speed is decreased to "slowest possible" (2 knots) and the periscope is raised so that a few inches of it project above the surface. It does not remain exposed for more than a few seconds. The attack is made from the direction of the sun and wind so that it is very difficult, if not impossible, to see the periscope, which is painted "a dull... Thanks to Rockhound57 :)

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