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Mobile Geographics MapTap for PalmOS CelestNav for PalmOS IQ Booster for iQue 3600 SJ23 sailwx.info tides

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Re: phrf




PHRF ratings vary from place to place. This isn't as weird as it sounds, because a boat's relative performance varies from place to place too. SJ23 versus Laser will be very different on a protected inland lake than it would be on Puget Sound with sometimes big waves and wind. So it isn't enough to just look for pure correction factors. You need to start by figuring out what measurement you want to make. The whole basis behind PHRF, Portsmouth, and other handicapping systems is to try to compare two boats that are inherently unequal, and any attempt to do that will have to include judgment, biases, and compromises.


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