When I
looked out we just had a few little white bugs on the boat today, so I was able
to make short work of them with the mop. Peter and Marianna motored over about
10:00 to discuss plans for the day. We decided to move to Hotham Island. It is
one of their favorite anchorages. Marianna wanted to stay 2 nights in one
place, either where we were or where we would move to next. We decided to move
in part because it is pretty, more sheltered and would be easier for us to
kayak.
Anchors were
pulled up at 11:00. We were anchored by 1:00. It was 10.8 nautical miles at an
average speed of 5.8 knots. Our speeds are a bit misstated because we spend
time slowly easing into the anchorages and also anchoring. On the way we passed
Fox Island, which one cruiser had recommended to us. We saw some beautiful anchorages
on the NE side of the island. Here is a typical rock formation we passed.
The mystery
of why my Garmin was giving me false indications about my heading has been
solved. It worked perfectly today. The only change I made was to switch to true
instead of magnetic headings on the chart plotter. I don’t know why that makes
a difference, but it does. If I run into an island now, it is my fault and not
the chart plotters. Kip Schmidt won a pitcher of margaritas for suggesting the
change. He says he will hold me to it. I know he will too.
We had lunch
and then our longest kayak ride to date. Hotham is big, but has several little
coves. We are in a very nice one and kayaked all around it, even going through
some tall reeds. Of course I was afraid we would run aground and puncture our
kayak, but Kerry navigated us safely.
My solar
panels set a new record for charging today. I saw them putting out 22.8 amps at
one point – totally amazing. I was able to get a picture at 21.7 amps. They
make a huge difference in battery life. The day after it was cloudy all day I
had to run the generator twice. Some days I don’t run it at all, or only once.
I thought I
saw the bow roller platform lift a little off the deck today when Kerry raised
the anchor. I tried to tighten the bolts but the nuts appear to be turning
underneath. I went into the v-berth with my tools, but got thrown out by Kerry
who was ready for a nap. I will have a, hopefully, small project to do
tomorrow. She promised to help then.
Peter and Marianna came over for dinner on Annie tonight. The menu was dipping oils with parmigiana cheese, grilled Italian sausage, relish plate with deviled eggs, black bean salad, and coconut cookie pudding for desert. It was excellent. Peter and I are lucky to be experiencing all this good food. Both Kerry and Marianna are having fun serving delicious meals with style. We ate up on the top deck, and it was beautiful.
What will I do when Jimbo and I are alone on the boat? Oh boy - standards will be lowered. The new strong clothes pins I bought held Kerry's sarongs in place to block the sun for Marianna. Dinner was finished in time for the Orros to make their dash home before the mosquitoes attacked.
Peter and Marianna came over for dinner on Annie tonight. The menu was dipping oils with parmigiana cheese, grilled Italian sausage, relish plate with deviled eggs, black bean salad, and coconut cookie pudding for desert. It was excellent. Peter and I are lucky to be experiencing all this good food. Both Kerry and Marianna are having fun serving delicious meals with style. We ate up on the top deck, and it was beautiful.
What will I do when Jimbo and I are alone on the boat? Oh boy - standards will be lowered. The new strong clothes pins I bought held Kerry's sarongs in place to block the sun for Marianna. Dinner was finished in time for the Orros to make their dash home before the mosquitoes attacked.
I think your Garmin chart-plotter can display two heading/course lines. One is "Heading," derived from the autopilot magnetic compass. the other is "COG," derived from GPS. "COG" is what works best for knowing where you're headed, what you'll run into. COG will "dance around" when you're stationary, as the GPS can't calculate which way you're moving, 'til you start moving. The Heading line, since it comes from a magnetic heading sensor, suffers from variation, deviation, and proper calibration & alignment.
ReplyDeleteAs an aside, a magnetic heading line and a true heading line should align with one another. The only difference will be the numeric value.
Thank you. I have a choice of auto or GPS for the heading line. It is set to auto. Once I set the system to true, the heading line accurately showed my heading. On magnetic, it was showing my course to starboard of my actual heading. So, it does not appear to me that it worked as you said. I would have thought that it would, however. Any more thoughts?m
ReplyDeleteMakes me curious... I'll look at the manual when I get a chance. You don't have a choice for two distinct lines, one being "Heading" (where the bow is pointed) and one for "Course" (where the boat is actually going)? "GPS" can only give "Course." It does not know where the bow is pointed, only where the boat is going, projected based on movement. It should give the most accurate course line. Again, True or Magnetic shouldn't matter.
DeleteWonder what sensor is used for the heading line when set to auto? And, how is magnetic variation determined? Is it manually set, or derived some other way? Any chance it's been set wrong, ie "west" when it should be "east?"
If the autopilot compass is being used for the heading line, you will find inherent errors, and the amount of error will be different on different headings. Magnetic compass deviation.
Looks like you're having another great trip!
Hux says Hi.
Not in the office, so I'm not sure of your Garmin model...
ReplyDeleteSee if your menu works like this:
from the Chart menu
Chart Setup>Chart Appearance>Heading Line>Source>
you have choice of
Auto (?)
GPS Heading (COG)
Heading (from your sensor)
COG and Heading - two lines!
Kerry always throws a 5 star dinner party on Sweet Annie !!!��
ReplyDelete