"John H." wrote in message
...
On Wed, 03 Oct 2007 12:12:17 -0400, Wayne.B
wrote:

On Wed, 03 Oct 2007 10:17:41 -0500, John H.
wrote:

It is a 25mm cannon. Never heard of a fish cannon. Potato gun, but
not
fish cannon.


Wrong. It is a 62 caliber 76mm Otobreda.

I'm a believer.

It certainly looks a lot bigger than 25mm, that's only 1 inch.

I don't understand the 62 caliber reference at all.

Well, I looked it up, and it is called that. It's also called a 3" gun.
Maybe Tom can explain how 62 calibre equates to 76mm. He knows a lot about
guns.


For small arms, a number like .45 cal means .45 of an inch. Assuming big
guns are the same way, all you need to do is convert to millimeters.