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Hi Chris... thank you for the information... I do believe you are talking about Silva's Polaris (type 7) and Silva's Explorer III (type 3)... you can find them at Forestry Suppliers (1-800-647-5368) for < $20 each... BTW, they are graduated in 2 degrees units. cheers, Danilo Allegrini "*canela*: dispositivo para achar pedras no fundo do rio." -----Mensagem original----- De: Chris Werner <clw5232@ga*.ac*.fs*.ed*> Para: Danilo Allegrini <danilo@up*.or*.br*>; techdiver@aquanaut.com <techdiver@aquanaut.com>; cavers@ca*.co* <cavers@ca*.co*> Cc: Zidane <dklein@uo*.co*.br*> Data: Segunda-feira, 10 de Maio de 1999 23:40 Assunto: Re: compass and depth gauge >We use the simple type 7 or type 3 hand compass. Keep it in your wet notes >and carry it in your hand when surveying. Place next to the line and read >from above. It's simple and fast. Forget digital or anything over >complicated. > >Chris > >----- Original Message ----- >From: Danilo Allegrini <speleos@ma*.co*.br*> >To: <techdiver@aquanaut.com>; <cavers@ca*.co*> >Cc: Zidane <dklein@uo*.co*.br*> >Sent: Monday, May 10, 1999 4:27 PM >Subject: compass and depth gauge > > >> Hi folks... >> >> I recall a discussion on this subject about a couple of years ago... I >went >> through the archives and found some very interesting data, but I still >have >> some questions... >> >> I will give my background first, in order to let you know which is my >> current degree of knowledge... I have been surveying in dry caving for the >> last six years and my Caving Club is responsible for 30~40km/year of BCRA >5B >> surveys... I was personally involved in the developing of the all the >> present technics we use today. My personal choice of compass is for >suunto's >> KB-14, balanced for zone 3, even though I also own a very similar Brunton >> model and a french Axium... >> >> Since I took up cave diving, my main objectives were all toward underwater >> survey... It was very easy to adapt our current procedures to use >underwater >> (wow! you have a _physical_ survey line...), but our biggest barrier to >> achieve the BCRA 5 grade was in the quality of the instruments... >> >> So, does anybody have any experience using a digital compass that is >> accurate to 1 degree?? I also learned that George and the WKPP are being >> succesfull using Suunto forestry models... could you guys please tell me >> which is the model?? If it is something similar to the KB-14, how do you >use >> it without reading through the window? >> >> Also, any tips in a very precise depth gauge would be of great use... >> >> greetings from Brasil, >> >> Danilo Allegrini >> > >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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