Your pet wears a lightweight, waterproof receiver collar that recognizes the radio signal. The buried wire carries a harmless, low level radio signal from a transmitter installed in your house or garage.

Merchant vessels over 100 gross tons have, by law, divided the crew into three watches, working four hours on and eight hours off, and turning the dog watches into one evening watch.Hidden fences are created by burying a ‘boundary wire’ a few inches underground around your property. For instance, during the Middle Watch you would hear the the following:Ġ2:30 2 bells, pause, 2 bells, pause, 1 bellĠ3:00 2 bells, pause, 2 bells, pause, 2 bellsĠ3:30 2 bells, pause, 2 bells, pause, 2 bells, pause, 1 bellĠ4:00 2 bells, pause, 2 bells, pause, 2 bells, pause, 2 bellsĪt eight bells your watch was over! All other 4 hour watches followed this same procedure except the Dog Watches.Īt the end of the First Dog Watch, only four bells were struck, and the Second Dog Watch bells were struck like this: 6:30 PM, one bell 7 PM two bells 7:30 PM, three bells and at 8 PM, eight bells. The bells were struck for every half-hour of each watch, with a maximum of eight bells.

A 24 hour day was divided into six 4 hour watches, except the dog watch (16:00 – 20:00 hours) which could be divided into two 2 hour watches to allow for the taking of the evening meal. See The History of Navigation ) The bell was rung every half hourÂ of the 4 hour watch.

(Time, in those days, was kept with an hourglass. As early as the 15th Century, a bell was used to sound the time onboard a ship.

Dogwatch meaning