~* Lucent Brass *~
One~Minute Sand GlassHistorical Reproduction of Antique Nautical Speed Calculator
Entirely Made With Lucent Solid Brass
A life saver (or other floating device) attached to a cord with knots placed at regular intevals was tossed overboard at Stern. A sailor, positioned at Aft with the end of the rope, would retrieve the lose cord and count the knots as the floater came closer while a second sailor, holding the Sand Timer tight in his fist to avoid dropping it, gave the end signal. The number of knots retrieved in the one-minute time would then be used by the duty officer to calculate the speed in nautical miles. Not Quite a Scientifically Exact Method but, Repeated Several Times in Different Headings and Weather Conditions, It Resulted a Fairly Good Average Speed. to Modify the Time or Emptied and Refilled with Your Own Sand. Please be Aware of the Fact That Once the Unit is Disassembled it Cannot Be Returned to Us.
It's Ready to be Presented to That "Special Someone"!
Dimensions and Specifications: Larger Than It Is. Please Refer to the Above Dimensions for Actual Size.
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Our Price $21.99
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