I use a Silva Ranger TD... had it for 40 years, works on land, sea, and have
used it in small planes for fun/checkup navigation. With use you become
adept at quick sightings lining up the needle/mirror/object ....accuracy is
certainly as good as most card compasses, maybe better. Global/zoned needle
is not really relevant with regard to accuracy and the movement of the
observer...go to the Suunto and or Silva site to get an understanding of
what global/zoned needle means.

"Chris Doubleday" wrote in message
om...
I am new to the world of compasses and sailing. My wife recently
purchased a sighting compass as a gift for me when sailing/cruising.
It is a traditional sighting compass with needle and mirror (Suunto
MC-2G-Global). I am more accustomed to using a compass with a compass
card and view finder. I suspect it will be difficult to get an
accurate bearing with the MC-2G-Global on a moving boat due to having
to adjust the bezel while sighting the landmark. Is this the reason
for the different design (card and finder) of the KB-20? The
MC-2G-Global does have a global needle which I underatdnw should help
with some of the pitching and rolling that will occur on a boat, but
it still seems like an error prone process, especially when trying to
get multiple simultaeous fixes as when dead recconing. The accuracy
is noted as 2 degrees, which I imagine is only attainable in the best
of conditions. Any opinions / experience with this sort of compass in
a cruising environment?