Originally posted by Hiroki
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wrist shot of my ExII in hokkaido recently enjoying the sub zero temp....Leave a comment:
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Grand Seiko really catching on!Originally posted by david.tan View Post
explanation from one of my GS fever fren
"In diving terms, air diver means using normal compressed atmospheric air which is 21% oxygen and the balance nitrogen, co2, etc.
Many people have the misconception that diving involves an oxygen tank. If one breathes pure oxygen for a prolonged period, you would die of oxygen poisoning.
There are other forms of diving such as EAN (enriched air nitrox i.e. increased oxygen ratio of up to 32%) and tri-mix helium (introduction of helium as a 3rd factor which is an inert gas and has no effect on the human body system apart from the mickey mouse voice) for deep dives below 200 feet/ (60m)
This GS diver watch is designed for use for the basic recreational diver using normal compressed atmospheric air of up to 200 feet (60m) penetration. I have written another comment on 200m dive watches in another thread somewhere. No one apart from COMEX divers needs more than even 150m if it is a dive certified watch as max. for recreational diving is 60m..
Anyway no one uses a dive watch to calculate dive time anymore since the last 15 yrs, any serious diver uses 2 dive computers (1 backup) which computes everything like your dive profile, body temp, ambient temp and also gives you much more bottom time compared to US Navy charts + dive watch.
Dive watches are only to tell people on land that you r a diver or diver wannnabe…." - Sir JosephLeave a comment:
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