Now that's got me thinking about safety of the homeland. I learnt two interesting things about the Spanish Armada of 1588 this week.
- The British long-barrel cannons called culverin or snake fired shot faster than the speed of sound. Don't get in the way.
- The beacons used for the single message of 'I see them!' were effective, carrying the message from Plymouth to Carlisle in probably 40 minutes. I figure that's about 600mph.