מפה ישנה גרמה לעלייה על שרטון ואבדן היאכטה ..


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מפה ישנה גרמה לעלייה על שרטון ואבדן היאכטה ..

הקישור :


A capsized boat continue to crash along the shoals in Carteret County even after the 3 people on board were in trouble and needed to be saved. The sailboat is long 26 foot Selah ran aground about in the morning Wednesday. The man who owned the sailboat, Chris McHugh from Beaufort explained the Coast Guard that the reason for the crash was the old chart and was going through what he thought was a channel when he ran aground.

The Selah begin with taking on water off Emerald Isle in Bogue Inlet.
The Coast Guard did not have chance to save the sailboat, because going near it was quite dangerous.
Tim Ryan was on board and tied himself to the Coast Guard boat and jumped in the water to help.

The 3 men were tethered together in order to be rescued. Then the Coast Guard begin pulling them in.

Read more at: http://www.vesselfinder.com/news/805-Old-chart-caused-a-sailboat-to-run-aground-Off-Emerald-Isle
Copyright © Vesselfinder


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תודה מטש, מתקשר לדיון בנושא המפות

היית חסר ביום שישי


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לא התערבתי בשרשור הקודם אבל כבר כתבתי את זה מתי שהוא: מפות של פלוטרים הן לא מפות מאושרות לנווט. זה מספיק טוב ליאכטות, ללא ספק, אבל צריך לזכור שהמפה לא מדוייקת ולא מעודכנת ולא צריך להסתמך עליה ללא בדיקה ויזואלית והשוואה עם אינפורמציה אחרת. מפות אלקטרוניות מאושרות (ENC) הן יותר מדויקות, אבל עדיין לא בטווח המחירים של יאכטונר ממוצע. אני מניח שגם אלינו הן בסוף יגיעו.

ועדיין, אף מפה - נייר או אלקטרונית - לא הפריעה לאף ימאי לעשות שטויות.


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איך לא לקרא לסירה

הטעות של הבעלים התחילה מזמן. הסירה חיפשה את עצמה.
לא נראה לי. אלא אם המפה מלפני 100 שנה. או שהיא מאוד ישנה וקרועה בדיוק באיזור הניווט.

האמריקאים מאוד מקפידים בבטיחות ימית מעדכנים ומפרסמים את המפות באופן חופשי.
אם לא "קפץ" שם הסלע או בקע מליבת כדוה"א באופן פתאומי - אזי הוא קיים שם מימים ימימה וגם מופיע במפות ישנות.

קשה להאמין שהמפה אשמה - צריך יותר פרטים ממה שפרסמו כדי לדעת מה בדיוק קרה שם.


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רבותי זו סירה של 26 רגל ולא צצים סלעים - לא

נראה שזו המפה אלא הגורם האנושי. ואמר זאת נכון מטש. כבר אמרנו בעבר שהמכשיר הטוב ביותר אינו יותר טוב ממפעילו.


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שגיאה במפת DNC

Navy OKs charts used by grounded minesweeper

By Christopher P. Cavas - Staff writer
Posted : Wednesday Jan 23, 2013 20:47:57 EST

While a review of the digital navigation charts (DNC) used by a Navy minesweeper that grounded last week in the Philippines found one additional error, the charts were declared safe Wednesday by the Navy’s top navigator.

“Ships should continue to confidently navigate with DNC, using all standard safe seamanship and navigation practices,” Rear Adm. John White, navigator of the Navy, said in messages sent Jan. 23 to Navy ships, commands and flag officers.


The National Geospatial-Intelligence Agency (NGA), creator of the charts, conducted “a comprehensive analysis of all DNC libraries,” White said in the message, and confirmed the error in the location of the Tubattaha Reef in the western Philippines, which the minesweeper Guardian struck in the early hours of Jan. 17.

The NGA reported earlier the location of the reef on the DNC charts was about eight nautical miles away from its true location.

“Additional significant errors” — up to four nautical miles — were found along the southwest coast of Chile, White reported in his messages. Those errors, he wrote, “are reflected on DNC and paper charts. NGA has issued warnings on those errors to all mariners.”

The two inaccuracies “are the only known significant errors in the entire DNC portfolio of over 3,700 libraries,” White wrote.

“No chart is infallible, but NGA’s DNC remains the most accurate chart portfolio available.”

The errors that were found came from the LANDSAT satellite survey images used to “geo-rectify” the digital charts, White wrote.

“Navy will be a key participant in a follow-on review of NGA’s procedures to ensure the products and services associated with nautical charting continue to be safe and accurate,” White said in the messages.

“I share NGA’s high confidence that these errors are isolated, and that DNCs are overall safe for navigation.”

Salvage Surveys Conducted

The Guardian remains hard on the reef in the Sulu Sea, a Navy official said Thursday morning local time, but shows no signs of additional damage. No signs of a fuel leak have been observed, the official said.

Salvage teams on Wednesday rigged hoses and lines for removing the ship’s fuel and “conducted a satisfactory defueling test, but have not commenced defueling yet,” the official said.

Waves in the area continue at about four-to-six feet, with isolated showers, and salvage teams are “working in pockets of isolated better weather to do these operations.” Teams are getting on and off the ship via small boats.

The U.S. destroyer Mustin has returned to the scene, with Rear Adm. Thomas Carney, commander of Logistics Group Western Pacific in Singapore, as the on-scene commander.

The salvage teams “are working through a number of environmental response plans,” the Navy official said and, in the next 24 hours, will “continue hydrographic survey and salvage planning.

Heavy lift cranes and other salvage and environmental containment equipment are en route from Singapore, but not expected to arrive for another week, the official added.

All of the Guardian’s 79 crewmembers were taken off the ship on the evening of Jan. 17, and 69 sailors are now returning to their home port of Sasebo, Japan, on board the Navy oiler Rappahannock.

A ten-member “command element” from the Guardian remains on the scene, the Navy official said.

While Filipino organizations are not taking part in the salvage operations, they are actively monitoring the wreck scene, which is on a coral reef in a protected environmental zone.

The U.S., the Navy official said, remains in constant communication with the Filipinos, and “continues to keep the Philippine coast guard and government informed of our actions.”