yazik.info Physics Pilot Charts Pdf


Wednesday, April 17, 2019

All US Pilot Charts below, are available for download in the BSB ver2 electronic The conversion from the official pdf files to BSB/kap files was done by the. Pilot Charts show prevailing patterns of weather and oceanographic information for the major oceans and seas of the world to aid in route planning and timing. Abnormal or severe ice or weather condiditons may require vessels to alter course farther south to the tracks represented on the late winter or spring Pilot charts.

Pilot Charts Pdf

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This chart is not intended to be used alone but in conjunction with other navigational aids. The chart presents, in graphic form, averages obtained from data. Atlas of Pilot Charts, spacer. Pilot Charts depict averages in prevailing winds and currents, air and sea temperatures, wave heights, ice limits, visibility. late winter or spring Pilot charts. Ice and weather reports should be. From N. 40 percent, force 7; from N.E. 19 percent, force 7; from E. monitored constantly when .

The one of concern to our region is the North Atlantic, which goes as far south as the northeast coast of South America. Since Pilot Charts are concerned with sailing conditions, there is a chart for each month. For the North Atlantic, there is a separate chart for the northern North Atlantic Labrador and north , the central North Atlantic south to Guyana , and a chart showing, in a larger scale than the central chart, the Gulf of Mexico and the Caribbean Sea, which is important for those sailing and cruising the Southeast U.

Each of these regions have a chart for each month. You can therefore use the chart to learn about the winds and currents in each month. Also shown on each chart are the currents and storms for the month covered. Other monthly information is given, depending on the location and month, like wave heights, water clarity, surface pressure, air temperatures, ice limits, visibility and gales. The main feature that first sparked my interest was the tropical storm tracking.

The map of the Caribbean and the Gulf of Mexico shows major storm tracks going back to the early s. They even have a small map of the region showing probabilities that there would be a tropical storm in different zones of a grid. Someday I'll have to upgrade to the latest version. In the screen on the right I have selected New from the File menu to create a blank image in Photoshop. One nice thing about using Adobe is that it determines the size of the graphic on the Clipboard and offers those dimensions for the blank file created by the New command.

Other graphic software may do the same, but I suspect this nice feature may be the result of Adobe owning both Photoshop and Reader. Without this feature you may have to make the new image oversized and crop it once the image is pasted.

Download Pilot Charts

In the screen above, PhotoShop provides a recommended size for the New file, which is exactly the dimensions of the graphic I copied onto the Clipboard using Adobe Reader. In this screen the New image file has been created in PhotoShop. Notice that it has stored the chart image in Layer 1 of the PhotoShop graphic file. This makes the current format of the chart unique to PhotoShop and it cannot be saved in a industry standard format until this formatting has been removed.

If you click on the screen thumbnail on the right and down load the full resolution image you may notice that the screen resolution has changed from those above. This system has a screen resolution of x I run Fugawi on my navigation computer, which has a significantly smaller screen.

If you have more than one computer available to you, use the one with more memory, faster CPU and higher screen resolution for the PDF extract process. In the screen capture I have started the chart calibration, which is the process by which Fugawi imports a graphic file and turns it into a navigation chart.

I am running Fugawi 4. The first step in the calibration process is to load the graphic file that contains the chart image. After the chart image has been loaded into the calibration program, Fugawi needs to be told what chart projection is used in the image.

The Pilot Charts are Mercator Projections. Next you must specify three reference positions on the chart image so Fugawi can determine how to plot latitude and longitude on the resultant chart. In the screen image on the right I have set the first reference point Circular Red Icon near the center of the chart.

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Using the mouse I placed it has close as I could to the intersection a latitude and longitude line on the chart. I then used the fine adjustment window pink highlight to tweak the selected point so it is as close as possible to the intersection of the lines.

Pilot Charts

Then I entered the latitude and longitude of this point yellow highlight. When you extract a chart image for import into Fugawi it is not necessary to extract the entire image of the chart; however, it is helpful to get at least one horizontal and one vertical boundary of the chart so you can read the values for the latitude and longitude lines used to calibrate the chart.

I then specified the 2nd and 3rd screen on the right reference points for Fugawi. These are obviously not navigation charts. Nor are they route planning charts as they really contain no navigational information.

They are a graphical representation of the climatology of an portion of the worlds oceans. They are not forecasts.

They are merely a norm derived from very limited data. There are not a lot of weather observation stations in the ocean. Mostly the data in these charts comes from ship observations, not always the most reliable data. So the Pilot Charts have a very limited use in the chart plotter.

They can be used to validate or refine a navigational strategy developed from conventional navigation charts. Once the voyage begins the real weather conditions should determine how you implement that strategy, not the information on these charts.

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Given the limited use that can and should be made of these charts with a chart plotting software package, many will find the process I described above to be too much effort for a very small gain, and I would not argue different. Consequently any time I want to compare a voyage I am contemplating with Climatology data I can do that in a few seconds. I also do not need to provide space other than a few MBytes on a hard drive for the paper charts.

Of course the real reason I have imported these charts into Fugawi is because I wanted to see how it could be done. Once accomplished I could see some value in having done so, but that was not the reason I started down this path.

Image Capture with SnagIt The process of capturing the Pilot Chart Image on the Clipboard, transferring it to PhotoShop and then saving the image as a graphic file can be a little tedious, especially on a less powerfull machine. I have been using SnagIt TechSmith. Com for years, principally for screen captures. All of the screen captures on this website were done with SnagIt. I only recently noticed that the latest version of SnagIt provides a printer function.

This allows me to print a file directly to SnagIt and then manipulate the print image as a graphic. This brings up the Print Dialogue Box. This eliminates the cumbersome process of copying to the clipboard in Adobe Reader and eliminates the need for PhotoShop in the process.

SnagIt is a relatively low cost, but very powerful product. I wouldn't download it just to capture Pilot Charts, but it has been one the most useful utilities I own.In October, ocean current sets to the Southwest at about 0. Central America and Caribbean voyage.

All of the screen captures on this website were done with SnagIt. These blue and red arrows are annotations I've added to the screen image. There are not a lot of weather observation stations in the ocean. Popular Tags america anchor april asia atlantic bahamas bilge boat caribbean central america charter crew crew available croatia crossing cruising florida liveaboard mexico navionics panama sail sailing san diego seattle transatlantic usa.

This eliminates the cumbersome process of copying to the clipboard in Adobe Reader and eliminates the need for PhotoShop in the process.

I then used the fine adjustment window pink highlight to tweak the selected point so it is as close as possible to the intersection of the lines.