I don't understand how either answer is telling me it's time to gybe. Bob
> On 10/06/2021 11:37 AM Shawn Wright via CnC-List <cnc-list@cnc-list.com> > wrote: > > > I don't race, but do use VMG when trying to get our best time to > destination, especially on longer days. This works well enough in many long > channels and inlets with wind aligned with our course, but sometimes it's not > aligned. In these instances I'll have to try this trick for fooling the VMG > by giving it a waypoint at the far end of whatever channel we're navigating. > Of course, I'll have to read the B&G manual, as their UI is not that > intuitive, or things don't always work as you expect. > > -- > Shawn Wright > shawngwri...@gmail.com mailto:shawngwri...@gmail.com > S/V Callisto, 1974 C&C 35 > https://www.facebook.com/SVCallisto > > On Wed, Oct 6, 2021 at 8:30 AM Dennis C. via CnC-List < > cnc-list@cnc-list.com mailto:cnc-list@cnc-list.com > wrote: > > > > Bob, > > > > First, let's define some terms. > > > > VMG (wind based) - the component of your velocity DIRECTLY upwind > > or downwind. > > > > WCV - waypoint closure velocity. The component of your velocity > > headed directly at your mark (assuming it's set in your GPS). This is > > often shown on most GPS systems as VMG. > > > > Now, if you don't have an instrument system that calculates VMG, > > don't use GPS VMG (WCV). The problem is that, as you approach the layline, > > WCV will tend to zero. If you overstand and cross the layline, WCV will > > become negative. While this is good information for when to tack or gybe, > > it's usually too late. > > > > Here's how to fake your GPS into giving you VMG (wind based). Set > > a waypoint well past the windward mark. Let's assume the race committee > > sets a good W/L course with the windward mark directly upwind of the start. > > Let's say the wind is from 000 and the windward mark is set at 000 for a 2 > > mile leg. Enter a waypoint in your GPS at 000 20 miles out. By setting > > the waypoint so far out, WCV will approximate VMG. > > -- > > Dennis C. > > Touche' 35-1 #83 > > Mandeville, LA > > > > On Wed, Oct 6, 2021 at 10:03 AM Bob Mann via CnC-List < > > cnc-list@cnc-list.com mailto:cnc-list@cnc-list.com > wrote: > > > > > > > I'm fairly new to flying a spinnaker. I did > > it last weekend in a race and I believe I overstood the mark as we were > > sailing 110 AW before the gybe and 85 AW heading directly to the mark. > > > > > > How does one determine when to gybe? > > > > > > Bob > > > Thanks to all of the subscribers that contributed to the list > > > to help with the costs involved. If you want to show your support to the > > > list - use PayPal to send contribution -- > > > https://www.paypal.me/stumurray Thanks - Stu > > > > > > > > > > > > Thanks to all of the subscribers that contributed to the list to > > help with the costs involved. If you want to show your support to the list > > - use PayPal to send contribution -- https://www.paypal.me/stumurray > > Thanks - Stu > > > > > Thanks to all of the subscribers that contributed to the list to > > help with the costs involved. If you want to show your support to the list > > - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks > > - Stu >
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
