Dog watch of Ship's Bell clocks) website explanation it says that ..."the Evening Watch is periodically divided into two watches. These are called Dog Watches because they "dog" the watch schedule for all divisions ahead by one watch period". It can be surmised that this may mean an action similar to the "feed dogs" on a sewing machine, although obviously the use of the term predates the use in the sewing machine. Dog watch Dog watch, in marine or naval terminology, is a watch, a period of work duty or a work shift, between 16:00 and 20:00 (4 pm and 8 pm).
Guard dog as a herding dog. The German Shepherd dog is widely used by police forces globally and private security companies in the UK, USA, the EU and elsewhere with very wide distribution. Note some are not AKC or UKC recognized and a few are not FCI recognized, but all at least have their own breed club. Guard dog A guard dog or watch dog (not to be confused with the attack dog) is a dog used to guard against, and watch for unwanted or unexpected people or animals. The dog is discriminating so that it does not annoy or attack familiar