Comments on: Error In Navigation – Tracing Paper Blamed http://gcaptain.com/maritime/blog/error-in-navigation-tracing-paper-blamed/ A Blog About Ships Sun, 14 Mar 2010 21:18:47 +0000 http://wordpress.org/?v=2.9.1 hourly 1 By: John http://gcaptain.com/maritime/blog/error-in-navigation-tracing-paper-blamed/comment-page-1/#comment-11701 John Tue, 27 May 2008 14:35:01 +0000 http://gcaptain.com/maritime/blog/?p=1623#comment-11701 JKB, many thanks for the insight. I'll add the Neptunuslex link to the main article. -John JKB, many thanks for the insight. I’ll add the Neptunuslex link to the main article.

-John

]]> By: John http://gcaptain.com/maritime/blog/error-in-navigation-tracing-paper-blamed/comment-page-1/#comment-13713 John Tue, 27 May 2008 12:35:01 +0000 http://gcaptain.com/maritime/blog/?p=1623#comment-13713 JKB, many thanks for the insight. I'll add the Neptunuslex link to the main article.<br><br>-John JKB, many thanks for the insight. I’ll add the Neptunuslex link to the main article.

-John

]]> By: JKB http://gcaptain.com/maritime/blog/error-in-navigation-tracing-paper-blamed/comment-page-1/#comment-11682 JKB Mon, 26 May 2008 07:01:39 +0000 http://gcaptain.com/maritime/blog/?p=1623#comment-11682 This comment over at Neptunus Lex (http://www.neptunuslex.com/2008/05/23/penny-wise-2/#comment-202625) has a link to the report. As the commenter points out the tracing paper was only a small contributer to a series of errors. Other errors were much more significant, such as poor chart work, sailing plan alteration, current miscalculations, etc. The transit was planned for periscope depth with fixes but was changed to submerged, at speed. The navigator failed to calculate the currents from fixes and relied on faulty tidal information. They didn't consult pubs that would have pointed out the tidal dangers, but the tracing paper did apparently obscure tidal information on the chart. They also were using soundings and contour crossing to signal the arrival at the turn. However, the board found that soundings in the area were not adequate for navigation. In addition, submarine depth and tidal corrections were misapplied when determining soundings. This comment over at Neptunus Lex (http://www.neptunuslex.com/2008/05/23/penny-wise-2/#comment-202625) has a link to the report. As the commenter points out the tracing paper was only a small contributer to a series of errors. Other errors were much more significant, such as poor chart work, sailing plan alteration, current miscalculations, etc.

The transit was planned for periscope depth with fixes but was changed to submerged, at speed. The navigator failed to calculate the currents from fixes and relied on faulty tidal information. They didn’t consult pubs that would have pointed out the tidal dangers, but the tracing paper did apparently obscure tidal information on the chart. They also were using soundings and contour crossing to signal the arrival at the turn. However, the board found that soundings in the area were not adequate for navigation. In addition, submarine depth and tidal corrections were misapplied when determining soundings.

]]> By: gertbue http://gcaptain.com/maritime/blog/error-in-navigation-tracing-paper-blamed/comment-page-1/#comment-11681 gertbue Mon, 26 May 2008 06:22:22 +0000 http://gcaptain.com/maritime/blog/?p=1623#comment-11681 Charts can be printed with reasonable quality on board ship from ARCS (raster image charts by UKHO for use in ECDIS); one chart per mission. Experience so far demonstrates that this solution highly satisfies mariners. Charts can be printed with reasonable quality on board ship from ARCS (raster image charts by UKHO for use in ECDIS); one chart per mission. Experience so far demonstrates that this solution highly satisfies mariners.

]]> By: JKB http://gcaptain.com/maritime/blog/error-in-navigation-tracing-paper-blamed/comment-page-1/#comment-13712 JKB Mon, 26 May 2008 05:01:39 +0000 http://gcaptain.com/maritime/blog/?p=1623#comment-13712 This comment over at Neptunus Lex (<a href="http://www.neptunuslex.com/2008/05/23/penny-wise-2/#comment-202625">http://www.neptunuslex.com/2008/05/23/penny-wis...</a>) has a link to the report. As the commenter points out the tracing paper was only a small contributer to a series of errors. Other errors were much more significant, such as poor chart work, sailing plan alteration, current miscalculations, etc.<br><br>The transit was planned for periscope depth with fixes but was changed to submerged, at speed. The navigator failed to calculate the currents from fixes and relied on faulty tidal information. They didn't consult pubs that would have pointed out the tidal dangers, but the tracing paper did apparently obscure tidal information on the chart. They also were using soundings and contour crossing to signal the arrival at the turn. However, the board found that soundings in the area were not adequate for navigation. In addition, submarine depth and tidal corrections were misapplied when determining soundings. This comment over at Neptunus Lex (http://www.neptunuslex.com/2008/05/23/penny-wis...) has a link to the report. As the commenter points out the tracing paper was only a small contributer to a series of errors. Other errors were much more significant, such as poor chart work, sailing plan alteration, current miscalculations, etc.

The transit was planned for periscope depth with fixes but was changed to submerged, at speed. The navigator failed to calculate the currents from fixes and relied on faulty tidal information. They didn’t consult pubs that would have pointed out the tidal dangers, but the tracing paper did apparently obscure tidal information on the chart. They also were using soundings and contour crossing to signal the arrival at the turn. However, the board found that soundings in the area were not adequate for navigation. In addition, submarine depth and tidal corrections were misapplied when determining soundings.

]]> By: gertbue http://gcaptain.com/maritime/blog/error-in-navigation-tracing-paper-blamed/comment-page-1/#comment-13631 gertbue Mon, 26 May 2008 04:22:22 +0000 http://gcaptain.com/maritime/blog/?p=1623#comment-13631 Charts can be printed with reasonable quality on board ship from ARCS (raster image charts by UKHO for use in ECDIS); one chart per mission. Experience so far demonstrates that this solution highly satisfies mariners. Charts can be printed with reasonable quality on board ship from ARCS (raster image charts by UKHO for use in ECDIS); one chart per mission. Experience so far demonstrates that this solution highly satisfies mariners.

]]> By: Jimmy http://gcaptain.com/maritime/blog/error-in-navigation-tracing-paper-blamed/comment-page-1/#comment-11680 Jimmy Mon, 26 May 2008 03:04:53 +0000 http://gcaptain.com/maritime/blog/?p=1623#comment-11680 ^^^^^ Agreed!!!! Penny wise Pound foolish ^^^^^ Agreed!!!!

Penny wise Pound foolish

]]> By: Jimmy http://gcaptain.com/maritime/blog/error-in-navigation-tracing-paper-blamed/comment-page-1/#comment-13630 Jimmy Mon, 26 May 2008 01:04:53 +0000 http://gcaptain.com/maritime/blog/?p=1623#comment-13630 ^^^^^ Agreed!!!!<br><br>Penny wise Pound foolish ^^^^^ Agreed!!!!

Penny wise Pound foolish

]]> By: tim http://gcaptain.com/maritime/blog/error-in-navigation-tracing-paper-blamed/comment-page-1/#comment-11676 tim Sun, 25 May 2008 20:31:06 +0000 http://gcaptain.com/maritime/blog/?p=1623#comment-11676 £5m will buy plenty of charts. The tracing paper while saving the chart cost more than it saved. £5m will buy plenty of charts. The tracing paper while saving the chart cost more than it saved.

]]> By: tim http://gcaptain.com/maritime/blog/error-in-navigation-tracing-paper-blamed/comment-page-1/#comment-13629 tim Sun, 25 May 2008 18:31:06 +0000 http://gcaptain.com/maritime/blog/?p=1623#comment-13629 £5m will buy plenty of charts. The tracing paper while saving the chart cost more than it saved. £5m will buy plenty of charts. The tracing paper while saving the chart cost more than it saved.

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