On 4/3/2017 1:59 PM, Charlie Gibbs wrote:
> On 2017-04-03, Tauno Voipio  wrote:
>
>> On 3.4.17 17:29, Martin Gregorie wrote:
>>
>>> Nope - I wouldn't have a clue about my weight and height in Imperial
>>> units, but then NZ went metric before the UK did - and did it faster,
>>> cheaper and with a lot less hassle than happened here. It was quite a
>>> shock to arrive here and have go back to using outdated Imperial units.
>>>
>>> Small side note: actually, I do use some of the old units due to the
>>> pervasive ICAO influence on aviation. As a glider pilot I measure speed
>>> and rate of climb in knots, altitude in both feet and meters and distance
>>> in km (because the Silver, Gold and Diamond badges measure distance in km
>>> and height in meters).
>>
>> In aviation, there is some sense in distances in nautical
>> miles (1 arc minute on great circle) and speeds in knots.
>>
>> Altitudes are measured in feet. The explanation was that
>> on the altimeter 1000 m / revolution was too coarse and
>> 100 m / revolution too fast.
>>
>> Vertical speeds are measured in feet/minute.
>>
>> As a born metric system user, I see aviation as a huge
>> mess of all kinds of units, especially as American made
>> aircraft have the manuals in inches and pounds.
>
> At least we finally switched temperatures to Celsius
> (Canada got there long before the U.S. did).
>
> The one that keeps me scratching my head is the way visibilities
> are reported in statute miles, while everything else is in
> nautical miles.

When did the US switch to Celsius?  Is that just aviation you mean?

I bought a cheap meter on ebay that includes a temperature probe.  It
didn't occur to me to check if it would read in Fahrenheit and it
doesn't.  lol

--

Rick C

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