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Old 10-16-2020, 05:25 PM   #1
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What’s this

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Old 10-16-2020, 06:52 PM   #2
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Looks like a taffrail log
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Old 10-16-2020, 06:53 PM   #3
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Well. Part of one.
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Old 10-18-2020, 07:52 AM   #4
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What is on the end opposite the dial?
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Old 10-18-2020, 08:20 AM   #5
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Old 10-18-2020, 08:38 AM   #6
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Not a knotmeter or log.

Probably just a simple 6 minute (1/10th of an hour) timer for doing dead reckoning chart work when making lots of course changes.
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Old 10-18-2020, 09:08 AM   #7
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Calculagraph timer...

https://www.ebay.com/itm/ANTIQUE-K-C...-/264588213603
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Old 10-18-2020, 10:46 AM   #8
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you got me psneeld That is a new one on me. Please give details on what it does and how it works.
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Old 10-18-2020, 11:56 AM   #9
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Best described here...have no idea what they were individually used for...just accurate time intervals like NS was pointing out...

Heck, may not even be boat related....

https://en.wikipedia.org/wiki/Calculagraph
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Old 10-18-2020, 12:05 PM   #10
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Best described here...have no idea what they were individually used for...just accurate time intervals like NS was pointing out...

Heck, may not even be boat related....

I just read further down on the link you provided an saw the interesting entry:


"Antique K.C. Company Germany Calculagraph Timer Used For Long Distance Calls Or In Billiard Halls. Overall good condition for its age, does show wear, see pics. It’s currently not working."
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Old 10-18-2020, 12:16 PM   #11
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So what does it do or used for?
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Old 10-18-2020, 12:25 PM   #12
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See here.....

https://en.wikipedia.org/wiki/Calculagraph
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Old 10-18-2020, 12:40 PM   #13
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WOW Thanks. I thought it had something strictly to do with navigation. I guess you could use it for navigation by plotting run times between two points?
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Old 10-18-2020, 01:20 PM   #14
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It has distinct red lines at 3 and 6.

Assuming these are minutes, it would correlate with the 3 minute and 6 minute rules for reckoning.

In 3 minutes: 100 times speed in knots equals yards travelled.

In 6 minutes: speed in knots divided by ten equals nautical miles travelled.
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Old 10-18-2020, 03:30 PM   #15
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Maximum time allowed from requesting coffee on the bridge to it actually arriving.
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Old 10-18-2020, 04:28 PM   #16
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I’m going with phone timer
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