Download 50 Ways to Improve Your Navigation by Dag Pike PDF

By Dag Pike

This is a publication approximately sensible navigation—packed with useful how one can make navigation more secure, more uncomplicated and higher. it's a publication for anyone—whether using an influence boat or crusing a yacht. And the strategies conceal either digital in addition to visible navigation.

This booklet begins the place others end. upon getting the real fundamentals of navigation, you want to see easy methods to translate those into functional navigation recommendations to exploit 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 adventure won from over 50 years of navigating an entire diversity of craft from excessive pace energy boats and lifeboats to ships and crusing boats. Written by way of the most skilled navigators on the earth, it's your passport to functional navigation ideas that may get you properly for your vacation spot even if in advantageous climate or foul.

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Secondly, deteriorating weather could lead to you getting worried about the conditions you might find in the entrance to your destination port. A strong onshore wind could make the entrance untenable or at least dangerous and that is the last thing you want at the end of a voyage in deteriorating conditions with rough seas or local fog. Either way, it is useful to be able to consider an alternative port. Thirdly, you might encounter sea conditions that are much worse than you anticipated. The weather is an obvious factor here, but you may have underestimated the effects of a wind-against-tide situation.

One of the main criteria of navigating safely is to maintain enough depth of water under the boat to give a good margin of safety: whilst the chart should confirm the depth, the real-time readings from the sounder are a reassuring help. The main time that a boat is at risk of grounding is when making a landfall or entering harbour, and this is where depth measurements can be a very important indicator. Even when the GPS shows the position to be safe, an adequate depth of water showing under the keel on the sounder is the important confirmation that you need.

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. One reason for suggesting that you draw some lines as a sector rather than a single line is to give a visual idea of the accuracy and if two of these sectors cross then you end up with a diamond of position.

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