Dog watch 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). This period is split into two, with the 'first' dog watch from 16:00 to 18:00 (4 pm to 6 pm) and the 'last' dog watch from 18:00 to 20:00 (6 pm to 8 pm). Each of these watches is half the length of a standard watch. The last dog watch is also referred to as the second dog watch in some sources. For instance Jack London in "The Sea Wolf",
Guard dog 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 people. Both guard dogs and watchdogs bark loudly to alert their owners of an intruder's presence and to scare away the intruder. The watch dog's function ends here; a guard dog is capable of attacking, or restraining the intruder. Livestock guardian dogs are often large enough, 100-200 lbs and strong enough to attack and drive