Posts Tagged ‘passage planning’

Sale! The Boating Bible Manual of Seamanship is on sale!

Monday, June 21st, 2010

The Boating Bible Manual of Seamanship

This month you can buy The Boating Bible Manual of Seamanship and save:

NB: Prices in Australian Dollars Was Now
Only
The Boating Bible Manual of Seamanship
$195
$135
Boat Handling 1 and 2
$45
$30
Navigation and Passage Planning
$45
$30
Safety and Emergencies
$45
$30
Skipper and Crew, Knots and The Language of the Sea
$45
$30
Weathercraft
$45
$30

Remember, this special offer expires on 30 June 2010.

Don’t miss this great opportunity. Use the ‘Share This’ button to tell your friends.
Click to get yours now – The Boating Bible Manual of Seamanship.

20% off The Boating Bible Manual of Seamanship

Tuesday, December 1st, 2009

During December 2009 you can purchase The Boating Bible Manual of Seamanship for only AU$156 – a 20% discount off its advertised price. This multimedia Manual contains the five titles listed below, plus you receive a free bonus 75-minute DVD, The Joys of Sailing.

If you’d prefer, you can buy single CDs for AU$40.50 – 10% off the advertised price. These would make ideal Christmas gifts for your family or friends who share your love of sailing:
* Boat Handling 1 and 2 (not sold separately)
* Navigation and Passage Planning
* Safety and Emergencies
* Skipper and Crew, Knots and The Language of the Sea
* Weathercraft

Order The Boating Bible Manual of Seamanship now to ensure you receive in time for Christmas.

Take advantage of this special offer today before prices go back up!

The very best navigation fix of all

Friday, May 15th, 2009

Now that the northern summer is coming so is the sailing. But by no means all of it will be done at sea or along the coast. Many countries have large systems of internal lakes, canals, rivers and other linked waterways where people love to explore and enjoy themselves.

 

In many cases, it’s near where they live and they know the waters very well. But many people are visitors, sometimes from overseas, and they have to know where they are so they can be sure they’re safe.

 

So what’s the best and most helpful bit of knowledge for such people? I believe it is to properly understand what a transit is. It is any two objects of any kind which are on the chart and can be seen in line from the water. Nobody has to know how to apply variation or deviation or any of the other subtleties of navigation because when you are along that transit line the only thing you don’t know is how far along it, but you know without fail that you are on it.

 

So it follows that if you’re able to get two transits – preferably at the same time, but close in time will do at a pinch – and they intersect you are at that point precisely where they intersect.

 

And the great thing about transits is that somebody else can take them while you’re busy steering the boat.

We have a disk which will help you to learn more about navigation and passage planning.

Passage planning – the great circle route

Tuesday, November 18th, 2008

When navigating over long distances it’s better to sail a great circle. Technically, these are circles on a sphere (Earth) whose planes pass through its centre. So, the equator is a great circle, and so is a circle through both poles. It follows therefore that any circle between those two is also a great circle. It is shorter to follow a great circle than to follow a straight line plotted on a chart.

Because it would be difficult to steer the constantly changing course that a great circle would demand, it is usually made up of a series of rhumb line courses between waypoints.

An alternative to this would be sailing a circle at, for example, latitude 30º north. This does not pass through the centre of the sphere (Earth) and is known as a small circle, as are any others like it.

Learn much more about Navigation and Passage Planning by investing in The Boating Bible Manual of Jeem the seamanSeamanship.

Passage planning – sailing the rhumb line

Monday, November 10th, 2008

Each year we see graphics of the Sydney-Hobart Yacht Race with the rhumb line shown. And it seems that the competitors should be trying to sail that course to optimise their chances. Tactics – covering your opposition or taking a flyer – and awareness of weather predictions can make skippers position their boats a significant distance from the rhumb line.

So how is rhumb line defined? A rhumb line is a course which intersects each meridian at the same angle. In practice this would mean sailing a steady course or following a constant compass bearing.

The Boating Bible Manual of Seamanship includes a disk on Navigation and Passage Planning.