Warbird Information Exchange

After seeing the model of the USS Arizona and the real thing, USS Texas, I'm reminded of an 8 X 10 photo I have of the USS New York going through the Panama Canal back in the 20s. On one of the masts, it has what at first glance looks like a clock with one hand. Then I realized it only had ten digits. What was it used for? My guess it was used for maybe a range indicator for the gunners?

it does have to do with range finding, i can find out more, my guys seemd to know about it......

Here is a link that explains the range clock, page down to the "R" section for this answer:
http://ussindianabb58.com/glossary.html

Scott

Thanks for the link. It was, mounted on the "bird cage" mast up fairly high.