Polar diagrams for sailing are used to improve your ability to sail your boat downwind. The use of polar diagrams means the less time on the water when going long distances and less exposure to the weather. It also mean less chances of running into a storm. On a day sail it could mean getting back to port before the wind dies down.
The basic strategy for the use of polar diagrams for sailing is similar to that of sailing upwind. It is the game of boat speed versus the wind angle. A shorter sailing route directly downwind with a deeper wind angle which makes for less speed. The other option is you can make it even more exciting by jibbing in a zigzag course which would make you sail faster to make up for the fact you have to cover more total distance.
Polar diagrams for sailing has the pinchers and footers going windward. Though opinions very on the race course, both types of sailors arrive at the water mark together. Going dead downwind is always slower than jibbing.
When using polar diagrams for sailing you must know how to use the trim and use it often. The healer trim is used the same way even if you are short handed. You need to pay attention to the spinnaker, your cruise chute or your Genoa. Adjust it and steer the boat when it is properly trimmed. Pay attention to the boat and how she is sailing by monitoring the pressure on the Sheets.
There is so much more to consider when using polar diagrams for sailing, such as your instrumentation skills and your luff curl. If your skills are up to par, focus on the following three things. Concentrate on your true wind speed; your boat speed, and your true wind angle.
Polar diagrams for sailing you have the optimum wind angle to steer for a given wind speed to get downwind the fastest. Look at the wind speed curve for the place that projects furthest to the bottom of the diagram. Note that the lower the wind speed the further up one must head to maintain optimum.
Try to keep the following in mind when sailing downwind and you are using polar diagrams for sailing. The first thing to consider is that you must adjust your courses wind angle to optimize your speed versus distance trade off. The second thing to consider is that you must pay attention to the pressure on the sails as felt by the sheets. The third thing is that you must not over trim your sails, especially the spinnaker Genoa.
The fourth and final consideration is that you must develop a feel for the boat and the wind by turning off the instrument systems to develop your instincts. The proper use of your polar diagrams for sailing and knowing your boat will help you to be a successful sailor.