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28 mar 2020 · A running fix is a method of coastal navigation position fixing. It incorporates the use of an estimated position along with bearings off of charted objects. Using bearings as well as an E.P makes this more accurate than an E.P alone.
In the illustration below a vessel obtained a good fix at 0600 (position “A”) and set course 285°(T) at a speed of 10 knots. At 0630 the D.R. was at position “B”, but a reliable fix showed the true position to be at “C”.
To effectively maintain the vessel’s DR position, the navigator must follow the 4 rules of DR. Plot the vessel’s DR position: 1. At least every hour on the hour. 2. After every change of course or speed. 3. After every fix or running fix. 4. After plotting a single line of position. Figure 903 illustrates applying these rules. Clearing the
27 lut 2020 · During deep sea voyages, GPS, if fitted, is the most favored means of obtaining the vessel’s position. When in Ocean passage / Deep waters there must be evidence that at least two independent methods are used for fixing the ship`s position.
problems of the sailings. This chapter discusses basic calculation methods and tabular solutions. Navigators can also refer to National Geospatial-Intelligence Agency (NGA) Pub. 151, Distances Between Ports, for distances along normal ocean routes. Pilot charts also offer some track and distance information.
18 cze 2019 · Nautical Chart work is the art of laying a safe course, fixing the position and reassuring that position, while steering the ship on that course. It's an imperative job which every ship navigation officer should master. Learn about eight important points to keep in mind while doing chart plotting.
Once on the working position and set-up on DP, the DPO should re-affirm his escape route. If the vessel is close alongside a platform, the most obvious escape route may not be the best. Moving the vessel ahead or astern is always preferable to a sideways manoeuvre. Moving sideways always uses more power and thrust for lower velocity and
