[OSM-talk] maritime borders

[Gervase Markham]

Robin Paulson wrote:
> i should say, i'm no expert on this, but the article i was talking
> about mentioned land cannons, which probably had none of the weight
> constraints that ship-based cannons did.

American Civil War-era howitzers had a range of over 1.83 km, and that 
was considered a long way for the time:
http://en.wikipedia.org/wiki/Cannon

There is no way a 14th century cannon of any sort could fire 22km.

Gerv