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- Newsgroups: rec.windsurfing
- Path: sparky!uunet!walter!sailor!ngs
- From: ngs@sailor.bellcore.com (Ned Stoffel 21374)
- Subject: Re: Question: Layline
- Message-ID: <1993Jan22.134049.18895@walter.bellcore.com>
- Sender: ngs@sailor (Ned Stoffel 21374)
- Nntp-Posting-Host: 128.96.80.90
- Reply-To: ngs@bellcore.com
- Organization: Network Technology Research Lab, Bellcore
- References: <1jnnc7$3gk@DIALix.oz.au>
- Date: Fri, 22 Jan 93 13:40:49 GMT
- Lines: 30
-
- In article <1jnnc7$3gk@DIALix.oz.au>, atr@DIALix.oz.au (Australian Technology Resources) writes:
- |> Hi there,
- |>
- |> can anybody out there in netland explain what a layline is,
- |> and what they are used for?
- |>
- |> I think they have to do with approaching markers but I'd like to know more about them.
- |>
- |> Thanks a lot
- |> Peter
-
- It is an imaginary line extending at different angles on both
- sides of a upwind mark. It is the line that you need to reach
- before your last tack in order to just clear the mark at optimal
- speed. I.e., if you tack just before the layline, you will need
- to pinch too close to the wind to achieve the mark and you will
- be slow getting there. (Worse yet, you have to tack twice if you
- undershoot the line.) If you waste too much time by sailing past
- the layline before your last tack, you will be able to foot to
- the mark at a high speed, but not fast enough to make up for the
- lost time. The layline, then is the optimum balance between these
- extremes. The laylines rotate around the mark when the wind changes
- direction. You should determine the layline by sailing toward the
- mark at a 'good' angle before the race, but be prepared to correct
- for wind shifts. You also have to take the currents into account when
- establishing the layline. Guessing the layline perfectly can make a
- big difference in the upwind leg of a race.
-
- Ned
-
-