YVR,
TSBB2 mentioned sea state adjustment. Kudos to him for mentioning this. Don't let this "Seastate" title fool you, as sea state really in my definition refers to steering ratios. All boats can have different steering ratios, a lower setting moves your rudder more, a higher setting less.
This simply means how many times do you have to turn the wheel for your rudder to move 180° or otherwise turn from far right to far left before it stops. If the seastate setting is too high, your autopilot is working too hard with quick adjustments & using unnecessary power. I find that equating this to steering ratio works best in most conditions
Seastate was supposed to mean the autopilot's electronics would average the current seas & adjust accordantly. I never believed that, what I did see was with my autopilot, was tied into my steering ratio.
Different boats have different ratios of steering (mine is 1 2/3 : 1 ratio). It all has to do with your steering quadrant diameter size & top gearing reduction relative to your rudder.
To find what ratio you have, first turn your wheel fully to STBD. Take two pieces of masking tape. Place one piece on your first wheel spoke when fully turned past the center of your pedestal. Place the other piece of tape at a 12:00 position behind the wheel on your pedestal.
Now carefully turn your wheel in the opposite direction to PORT. As you do this, take note of how many full turns (360°) you make past the tape mark on your pedestal. What was it, 1 or 2 turns? If the spoke tape moves past this 12:00 position, calculate what percentage past this angle the spoke is at. Say, 1/3 of 360°, 1/2 of 360° and so on.
So, if it takes 1 1/2 turns, you have a setting of 1.5 : 1 ratio steering. If you go two turns or more, you have a 2:1 ratio or more depending on how far the spoke is past 12:00. All Otto's react differently to "seastate ratios." If it's a little more, try to go to the next setting. Mine is set at the third setting (3/7%) of my seastate. This works well for me under most conditions. You can always adjust this setting up or down as seas are always different. But, I find my fixed setting does well 97% of the time. Play with these settings in varying conditions & you will find the mark that works best for you. If seas are quicker, turn it up a notch.
The final test is knowing that you are sailing in a liquid medium. Weather, waves & current are always in flux & ever changing. The secret for me is keeping Otto happy. The best way to do this is to always BALANCE your boat to the conditions you find yourself sailing in. If you can adapt, you & your firstmate will get along just fine.
CR