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From: PeterO <rebyl_kayak_at_energysustained.com>
subject: RE: [Paddlewise] Currarong to Guerilla Bay, seasonal padding and a navigation question
Date: Thu, 28 Apr 2011 17:49:49 +1000
G'day Craig,

Glad you enjoyed the report. Our seasons do change the paddling activity
slightly but it's usually good paddling weather all year round, which I
suspect means that kayaks here may not be as well maintained on average as
in the northern parts of the US, and Canada!

Summertime tends to bring warm northerly winds and the occasional cold
fierce southerly buster, meaning there's more focus on in water skills,
rescues and protracted rolling sessions. Autumn is perfect for trips in New
South Wales with the water at its warmest. Winter more consistently brings
cold southerlies and endurance training with rolls for those that can endure
the harsh 16 degree Celsius water! (OK so we can't imagine what harsh really
is:~) Some head north to Queensland though pity them this year as it's done
nothing but rain up there. At the start of spring the 110km Hawkesbury
Classic makes an ideal endurance training goal, after which some of us go
crazy again for in-water training. 

And when it rains we might repair the boats and their gear. We had a drought
for about ten years and now we're experiencing floods everywhere and my
boats and gear are starting to look quite respectable again!

The trip last week took us into unexplored territory and some significant
open crossings so we decided to learn how to use GPS to supplement our
meagre knowledge. It led me to a question concerning the marine definitions
and usage of the terms 'heading' and 'course'.

The following summarises my understanding of the definitions

	Heading - the direction the boat is pointing to
	Bearing  - direction from the boat to a landmark, but GPS
manufacturers often use bearing to mean the direction to a waypoint
	Course - the direction to a destination
	Track - the path taken to a destination

	Heading, bearing and course can each be qualified as either a
compass (magnetic) or true heading, bearing or course. 

	To deal with currents or tacking one can refer to either course
through the water (doesn't compensate for current or tacking) or
course over ground (the average direction in which the boat moves after
allowing for currents and tacking)

However, I've started to wonder whether my understanding of heading is
correct particularly in the case of ferry gliding. In this case is the
heading the direction in which the kayak is pointing or the direction in
which it is moving?

I'd be very glad of any corrections and explanations.

All the best, PeterO
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