Next message: Carl Herzog: "Re: GPS shortcomings."
Dan:
The Davis Mk 3 was a toy. I, too, once purchased one and found it
completely useless. (I notice that Davis no longer manufactures it)
Please do not judge the Mk 15 or Mk 25 by the Mk 3; the Mk 15/20/25 are
real micrometer drum sextants whose only "fault" is being made out of an
engineered plastic.
Lu Abel
Dan Allen wrote:
> On Jun 8, 2005, at 11:05 PM, Lu Abel wrote:
>
>>> Metal is more reliable. Won't warp and is less liable to temperature
>>> effects. Nothing new or controversial here.
>>
>>
>> Do you speak from experience or just theory about "plastic?"
>
>
> I have not used a Davis Mk 15 or Mk 25, but I do own a Davis Mk 3,
> the $34 Davis.
> It is terrible: 20-50 mi accuracy. Maybe it warped and is atypical,
> but the whole experience of using it is so bad that I just ignore it
> now.
>
> Buy a new Astra IIIb, or a used metal sextant if you have to.
> It will improve your accuracy just from the pride of ownership! ;-)
>
> Dan
>
>
