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--- Jim Thompson  wrote:

> 4. Average time by adding up the minutes and seconds
> and dividing by the
> number of sights, then adding that average to the
> whole hour.
> 5. Average altitude by adding up the minutes and
> seconds and dividing by the
> number of sights, then adding that average to the
> whole degrees.

When I teach this, I find that students have less
trouble if they first convert all altitudes to minutes
of arc, and all times to seconds of time, and then do
the averaging. Then when they are done, convert back.

A programmable calculator makes it easier.

Chuck Taylor
 47d 55' N
122d 11' W


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