17th century armada chest with 9 bolts

Dmitry · 29th August 2013, 01:28 PM

I thought graphometer was a land-surveying tool. How would you use it in navigation?

fernando · 29th August 2013, 04:19 PM

Also used aboard to measure by angle the position of objects on sea or points in land. Not exactly for navigation ... but (also) a naval utensile

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M ELEY · 30th August 2013, 06:30 AM

I had to do a bit of research just to identify the piece, but Fernando hit it on the head. Mostly a 'land tool', but also used to find the 'lubber's line'? This mathematical stuff boggles my mind!

fernando · 30th August 2013, 03:27 PM

I know nothing of these things either ... or of any things at all

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It just came to my mind that many orientation devices are invented to serve in firm land and later adapted for naval or navigation use; such is the case of the extremely significant astrolabe.

M ELEY · 31st August 2013, 09:40 AM

Excellent point,though,Fernando.The graphometer isn't used in navigation (my typo error), but could be used at sea in both an engineering capacity or possible military usage, such as for determining the best place to storm a coastline, etc. Off-topic,

sorry.

fernando · 1st September 2013, 03:36 PM

Quote:

Originally Posted by M ELEY

... Off-topic,

sorry.

Man shall not live by bread alone

Marcus den toom · 4th September 2013, 06:59 PM

another example that is for sale, minimum bid 280 great britttain pounds.
Measures 17" long x 7 3/4" deep x 9" high, opening to reveal green painted interior.

fernando · 4th September 2013, 09:40 PM

Quote:

Originally Posted by fernando

Man shall not live by bread alone

Still, for an off forum scope topic, this 'chest parade' has gone a fair long way ... prices and all

29th August 2013, 01:28 PM	#1
Dmitry Member Join Date: Jul 2009 Posts: 607	I thought graphometer was a land-surveying tool. How would you use it in navigation?

29th August 2013, 04:19 PM	#2
fernando (deceased) Join Date: Dec 2004 Location: Portugal Posts: 9,694	Also used aboard to measure by angle the position of objects on sea or points in land. Not exactly for navigation ... but (also) a naval utensile .

30th August 2013, 06:30 AM	#3
M ELEY Member Join Date: Dec 2004 Location: NC, U.S.A. Posts: 2,158	I had to do a bit of research just to identify the piece, but Fernando hit it on the head. Mostly a 'land tool', but also used to find the 'lubber's line'? This mathematical stuff boggles my mind!

30th August 2013, 03:27 PM	#4
fernando (deceased) Join Date: Dec 2004 Location: Portugal Posts: 9,694	I know nothing of these things either ... or of any things at all . It just came to my mind that many orientation devices are invented to serve in firm land and later adapted for naval or navigation use; such is the case of the extremely significant astrolabe.

31st August 2013, 09:40 AM	#5
M ELEY Member Join Date: Dec 2004 Location: NC, U.S.A. Posts: 2,158	Excellent point,though,Fernando.The graphometer isn't used in navigation (my typo error), but could be used at sea in both an engineering capacity or possible military usage, such as for determining the best place to storm a coastline, etc. Off-topic, sorry.

4th September 2013, 06:59 PM	#7
Marcus den toom Member Join Date: Jun 2013 Location: Netherlands Posts: 535	another example that is for sale, minimum bid 280 great britttain pounds. Measures 17" long x 7 3/4" deep x 9" high, opening to reveal green painted interior.