Download 50 Ways to Improve Your Navigation by Dag Pike PDF

By Dag Pike

This is a e-book approximately functional navigation—packed with functional how you can make navigation more secure, more straightforward and higher. it's a e-book for anyone—whether using an influence boat or crusing a yacht. And the suggestions hide either digital in addition to visible navigation.

This publication starts off the place others end. upon getting the real fundamentals of navigation, you might want to see how you can translate those into sensible navigation options to take advantage of while making plans sooner than going to sea and as soon as you are out there.

50 how one can increase Your Navigation distils Dag Pike's event received from over 50 years of navigating an entire variety of craft from excessive velocity strength boats and lifeboats to ships and crusing boats. Written through probably the most skilled navigators on the earth, it's your passport to functional navigation suggestions that may get you adequately for your vacation spot even if in wonderful climate or foul.

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Sample text

A deep or relatively shallow area can often give you an indication of your position and your echo sounder is one of the most useful tools for visual navigation. The depth can also indicate where you are not, and either way, it is useful information. Closer to land, there are many more positional clues in addition to the navigation marks and soundings. For example, two identifiable marks on the shore in line (or nearly in line) will give you a position line and you must be somewhere along it. A single mark can help you fix your position if it lies ahead (or nearly ahead) and again you know that you are somewhere along that heading line.

When planning your route look out for conspicuous buildings and other features that are shown on the chart, so you can be prepared for them as you approach. We tend to focus on things like church spires, lighthouses and high buildings but you can extend the range to include distinctive hills and mountains in the distance (provided they are marked on the chart). One of the best transit marks is a beacon or light on an isolated rock offshore, because its apparent movement will change quite quickly in relation to the background land.

A bearing taken from a yacht, for instance, is likely to have a possible error of a few degrees to either side of the reading, so when you transfer it onto the chart it would be better to show it as a narrow sector rather as a single line. The same would go for using the course line as a position line because you are never precise about the heading. By contrast a transit bearing is very precise and unambiguous, so it can be shown as a single line. When you have two position lines that cross at a reasonably open angle, you have a position fix, but the accuracy of that fix will only be as good as the accuracy of the position lines you are using.

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