רענון ידע בבקשה

zina71955

New member
זה פחות או יותר מתאים לשיפור בזמן התגובה במנועים חדישים.

זה טוב יותר ממה שהיה במחצית השניה של שנות השישים, אך, כאמור לעיל, לא משנה את הקומונסנס שלי. בוא ניקח אונייה קטנה הרבה יותר מאותם ימים, "הדר", בת כ 8000 T/DWT בעלת כושר תימרון נהדר. אני מגיע ביום ראשון לפיראוס, גנואה או מרסייל. מאות כלי שייט קטנים מנועיות ומפרשיות במבואות הנמל קריס/קרוס ביני לבין סירת הנתב. אם היה זמן כלשהוא בחיי שבו פחדתי - זה היה הזמן. הטרמינלים של אוניות הענק רחוקים כיום, במרבית המקרים ממקומות ריכוז של כלי שייט קטנים, אך הנתיבים /תעלות אליהם עוברים בקירבת מקום וחייבים להיות חופשיים לתנועתם. וזה לא בדיוק המצב כיום. ואפשר לשפרו על ידי פיקוח ואכיפה.
 

gerson1

New member
כאשר מעלים נתונים כדאי להסביר מה הם המושגים:



 

gerson1

New member
ובקטנה

אוניה שאורכה 360 מטר שקוטר סיבובה בADVANCE 4.5 מאורכה הרי שמדובר בכמעט מייל ימי...
התקנות כלשונן:

In Rule 9 a vessel proceeding along the course of a narrow channel or fairway is obliged to keep "as near to the outer limit of the channel or fairway which lies on her starboard side as is safe and practicable." The same Rule obliges a vessel of less than 20 metres in length or a sailing vessel not to impede the passage of a vessel "which can safely navigate only within a narrow channel or fairway."

The Rule also forbids ships to cross a narrow channel or fairway "if such crossing impedes the passage of a vessel which can safely navigate only within such channel or fairway." The meaning "not to impede" was classified by an amendment to Rule 8 in 1987. A new paragraph (f) was added, stressing that a vessel which was required not to impede the passage of another vessel should take early action to allow sufficient sea room for the safe passage of the other vessel. Such vessel was obliged to fulfil this obligation also when taking avoiding action in accordance with the steering and sailing rules when risk of collision exists.

Rule 10 of the Collision Regulations deals with the behaviour of vessels in or near traffic separation schemes adopted by the Organization. By regulation 8 of Chapter V (Safety of Navigation) of SOLAS, IMO is recognized as being the only organization competent to deal with international measures concerning the routeing of ships.
The effectiveness of traffic separation schemes can be judged from a study made by the International Association of Institutes of Navigation (IAIN) in 1981. This showed that between 1956 and 1960 there were 60 collisions in the Strait of Dover; twenty years later, following the introduction of traffic separation schemes, this total was cut to only 16.

In other areas where such schemes did not exist the number of collisions rose sharply. New traffic separation schemes are introduced regularly and existing ones are amended when necessary to respond to changed traffic conditions. To enable this to be done as quickly as possible the MSC has been authorized to adopt and amend traffic separation schemes on behalf of the Organization.

Rule 10 states that ships crossing traffic lanes are required to do so "as nearly as practicable at right angles to the general direction of traffic flow." This reduces confusion to other ships as to the crossing vessel's intentions and course and at the same time enables that vessel to cross the lane as quickly as possible.

Fishing vessels "shall not impede the passage of any vessel following a traffic lane" but are not banned from fishing. This is in line with Rule 9 which states that "a vessel engaged in fishing shall not impede the passage of any other vessel navigating within a narrow channel or fairway."In 1981 the regulations were amended. Two new paragraphs were added to Rule 10 to exempt vessels which are restricted in their ability to manoeuvre "when engaged in an operation for the safety of navigation in a traffic separation scheme" or when engaged in cable laying.

In 1987 the regulations were again amended. It was stressed that Rule 10 applies to traffic separation schemes adopted by the Organization (IMO) and does not relieve any vessel of her obligation under any other rule. It was also to clarify that if a vessel is obliged to cross traffic lanes it should do so as nearly as practicable at right angles to the general direction of the traffic flow. In 1989 Regulation 10 was further amended to clarify the vessels which may use the "inshore traffic zone."

מאתר IMO
 

zina71955

New member
ובגדולה

Rule 2 b
In construing and complying with these rules due regard shall be had to all dangers of navigation and collision and to any special circumstances, including the limitations of the vessels involved, which may make a
departure from these rules necessary to avoid immadiate danger
 

מטש2

New member
ADVANCE זה לא קוטר סיבוב (גם לא רדיוס)

ADVANCE הינו המרחק שהאנייה תתקדם קדימה לאחר הפניית הגה מלא לאחד הצדדים. לא לבלבל עם רדיוס וקוטר : זה תלוי במהירות ויכול להיות שונה מאד מהרדיוס או הקוטר.
 

gerson1

New member
אכן שניהם רהב ומאירסון צודקים

ולכן הוספתי את הציור המדגיש את שלב המשך התנועה עד להתחלת הסיבוב
הציון קוטר כ4.5 באורך כלי השיט לקוח ממחקר שבוצע עבור IMO ואכן במהירוית שונות
 
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