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There is an easy workaround. Just remember that one-tenth of a minute is 
six seconds. Just multiply that tenth by six in your head before 
entering it. For example, to enter 34° 16.7' you enter 34.1642 having 
multiplied the .7' by six in your head.

Same thing when reading out a result, just divide the seconds by six in 
your head, e.g. 107.3419 becomes 107° 34.3' after rounding the trailing  
"19"" to the nearest multiple of "6" and then dividing by "6".



gl

David Smith wrote:
>
> I would like to speed up the checking of calculations in sight 
> reduction exercises by using an electronic calculator. I have never 
> used a scientific calculator before, but they don't look too difficult 
> to master. However the two Casio calculators that I have, the Casio 
> fx-82MS and fx-82w appear to only work in DDDMMSS.
> Is there a way of entering DDDMM.M and getting answers in the same 
> format? If this is not possible, are there any common calculators or 
> iPhone/iPad apps which are useful for sight reduction calculations? As 
> I want to get a good familiarity with the printed Nautical Almanac and 
> sight redution tables, I am not lookiing for anything more 
> sophisticated than basic arithmatic in DDDMM.M format.
> I'd value your advice.
> Cheers,
> David.
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