Though Navigation these days is much simpler, accurate, and, safer using
"Global Position by
Satellite"
(GPS) fixing navigation equipment, a knowledge of Basic Navigation is useful. What happens if you loose power or Global Navigation
is switched off (unlikely but never the less possible)
With no direction signs or defined roadways it is necessary for us to use a "Steering Compass". From this we can sail a "course" or direction.
This direction is labelled in degrees from 0� due north through east, south, west, and back to North which is both 0�
and 360�. Using a "chart" (a map of the sea) and a means of measuring and transferring the course or angle with parallel
rules (or other patent instruments) we note the course that will take us to our destination, ensuring that there are no dangers
on route. With dividers we measure the distance between our starting point and our destination and using the dividers to transfer
the "gap" measure distance on the scale at the side of the chart; one minute of latitude equals one nautical mile: see waypoint navigation)
this will give an idea of the time that the journey will take. A good average speed for a sailing boat is around 5 knots
(6 land miles per hour).
From the compass rose on the chart we measure the angle or our course.
We then point the boat in this direction using the boats steering compass to guide us onto our correct and required course.
Simple enough, except there are several possible reasons why we may not reach the place we need.
- The tidal stream may well have taken us off course
- The helmsman may not have steered a straight and true course
- The boat may have been pushed sideways somewhat by the wind, this is called leeway
An evening class in navigation is an excellent way to learn all about navigation!
Courses available include the following.-
Competent Crew, Practical
Day Skipper, Shorebased and Practical
Coastal Skipper, Shorebased and Practical
Offshore/Yachtmaster, Skipper, Shorebased and Practical
Ocean Yachtmaster, Shorebased
For information on where to take the above sailing courses contact the RYA
For specific information on training and courses RYA Training
�keith matthews2001
