Cruisin' around on the Party Barge sort of arvo. The wind filled in as soon as Waldorf and Statler got out, and happily enough, just as Anita got in. I was trying for some alpha's but went way too wide, I wasn't trying for a nauti and managed a 30...go figure. Feeding time now so post more later.

Barge (Xantos 310)  FF waisted proto, Avalon 7.0

Another great Pt Grey session, joined by Waricle The Scud and Hardie.

Wind seemed a bit light was tempted to use the 6.6 but glad I didn't as the wind kicked in nicely.

More west in the wind today, which suited Pt Grey better, especially for the Port tack run along the weed.

Nice having a speed run in bother directions, + an alpha track through the weed.

Trouble with only having one track through the weed.

The U ends up to narrow at the start/finish.

A fun sail whilst the wind blew. Lovely long powered up runs.  Glory Holes, Australind, WA, AU.

Liptons fantastic conditions and great sailing

Was a bit disappointed with my alpha of 23.2 thought I'd done my best alpha for years, just checked with KA72 and got a 24.649, I'll send my file 

Edit 23/11 = Have been informed by a member of the technical committee that Speedreader uses much stricter data criteria than KA72 to screen out data error, so I'll leave it as it is.  However,  I may start using KA72 again though, as that alpha did not feel like a 23kt alpha, I'm experienced enough to gauge the speed of alphas, and I was expecting to see 25kts+alpha because it felt that fast. The KA72 alpha of 24.649 was much closer to how it felt and having spent many years doing alphas in the 24/25/26kt range I think I can trust my experience.

Mike here, exercising captains perogative.

Joe's file had very bad data during the gybe, because he wears the GT31 on his chest. Leaning into the gybe obscures a lot of satellites directly but gives the unit a clear view of reflections from the water.  This caused the +/- values to go over 2knots. Speedreader changes these numbers to 0, resulting in a lower alpha.

KA72 seems to ignore accuracy numbers altogether, allowing some less than optimum results through.

Personally I think reducing these numbers to 0 maybe a tad harsh, so I've done a recalculation, with the offending numbers reduced by their +/- numbers. That comes out as an even 24, so I'm quite happy to see that.

But the take away lesson here is, don't wear your unit low on your shoulder!!!!

And just for comparison, here's my alpha gybe, with my DIY unit on top of my head

And here's a GW60 on my wrist.

the unit on my head doesn't change at all, and the GW60 does change going from over to under arm, but not enough to trigger filters.