Tuesday, March 27, 2012
Its a sine curve, with the equation
Lattitude = 23.5 x Sine (theta)
But theta is an angle, and you have to make it a percentage of the 92 day season between March 21 and June 21.
So here is a picture of the idea. Now, Hilo is 19.75 degrees north, so the date of overheadness is May 17, and if I leave on July 9, I will be crossing the sun's path again at 22 degrees north.
Friday, March 23, 2012
So I am watching the sun and waiting for the light to come from overhead. Since I am at 20 degrees 45 minutes, that shouldn't be long. Here is a quiz. If the sun works in a sinusoidal curve from equator to tropic to equator to other tropic, based on the revolution around the sun (which we would assume is circular, but really it isn't) then what day does the sun reside directly over 20.75 degrees north lattitude?
You should note that the sun is directly over the equator on the equinoxes.
Except that all of that is not really true. It would be nice if it was, and that is what I base the quiz on, but the truth is more complicated, like leapyears and such. The earth doesn't go around in a circle, so the sun spends more time over the northern part of the sine curve than the southern (hence the colder south pole) (well, the fact that land is on the south pole also has something to do with that) So if you want to be exact, you need the almanac. But that's just the way it is. Part of the trick with Celestial navigation. But you can do all right with the navigation with a sine curve.
Ok, back to business. Hawaii is about the same lattitude (just a little south), so if I leave April 30, and get in before June 1, will I see the sun directly over my head during the passage?
I don't think it will be that impressive, but I've never seen a directly overhead sun. The closest I've come was probably in Vietnam last June, when I was about 10 degrees north, and the sun was still to the north of me.
Or in Costa Rica in March a few years ago, I was at 8 degrees, and the sun was at 0. Close, but not perfect.
So I am happy with the returnation of the sun to the northern lands (sorry for you folks down under).
Saturday, March 17, 2012
There are some beautiful things I get to see, but they lack the meaning without getting to share them with someone. I can try to share with you, faithful blog reader, but that isn't quite the same, I am sorry to say. Anyways, I am coming home, not because the money is really running out, but because I lack the enthusiasm to go on alone.
The surf shot is from Kemi Vernon
Tuesday, March 13, 2012
There have been a few other boats that haven't been racing (as far as I can see). A big trimaran and a big sloop, both showed up here and then left again, without partaking in the races. I hear there is some long distance race that they might have just finished here, and now are going home. So on the homeward bound leg, I caught up with this super fast trimaran and got some pictures before I left him in my wake...
Anyways the wind is good and the races are fun to sail around and watch. El Presidente de Mexico was here to watch the race, so I got close to him, but didn't see him in person. Too bad. I've seen the prez of Panama and China, why not one more?
Here are some pictures from the racing...
And a helicopter for someone to identify.
Wednesday, March 7, 2012
Ok, enough of that. I just took a bite. I'm not going to be ruined by this parting of friends (sorry to those of you reading) but I will remember.
Anyhow, this catamaran is Cat 2 Fold, a cool looking thing that is heading back north right now, with a friendly couple that I met back in Cabo in November. Also, my friend Stefan, the German guy who I've been surfing with and playing chess against, he is heading to the south, to Costa Rica, in a few weeks. And the "fleet" of people crossing the pacific will depart soon.
My departure date is still up in the air, but I am really leaning towards April 30.
Also, for those of you reading and writing comments, I really appreciate the commenting, but I am unable to respond to any comments or questions unless you make sure I know your email address. Feel free to send me an email using email@example.com, or let me know in the comment who you are, so I can find your email in my files.
Here is another shot of Altair with the new solar panels and the racing Genoa up (in place of the cruising-beat up-rusty jib)
Unfortunately I lost this race as well, since I went to the wrong mark.
But I am undefeated in the downwind spinnaker runs.