No, during the period in which the Aubrey/Maturin novels were set they had only two watches, known as the port and starboard watches.
Lack of sleep was an issue. Old salts are renowned for being able to go to sleep quickly, sleep through any noise they are used to, and wake the instant they hear something wrong.
An old guy I used to sail with would be snoringly sound asleep in less than about 3 minutes after he went to bed. He would sleep like a baby but the second something about the yacht’s motion or the flap of the sails wasn’t right, he was on deck wide awake. And then back in his bunk sound asleep five minutes later once the problem was fixed.
The 1800 to 2000 watch would eat before going on watch and the 1600 to 1800 watch would eat after coming off watch.
On merchant ships there is no dog watch. But at 6:00 PM each man is relieved for 30 minutes while they go up and have dinner. Now with full atomization and only day workers I guess that is different.
Now your going to have to serve 8 to 12 to 16 hours a day, so what if you were put on dog watch ? Well then you might be serving two hours extra, and besides if you were on 2nd dog watch, the proper dinner might already be consumed; you’d get soup… hot water sitting in the used pots.
Old time sailing ships I do not believe they stowed the hammocks. The crew living before the mast lived in the folscle when not on watch or working. They stood their watch and during the day light hours they would be doing repair work on sails, rigging, or the ship. If the ship was sailing on a straight course then then it did not take many hands to adjust sails or rigging. But in a storm it could be quite different. A man could come off watch just get to sleep and the call for All Hands On Deck could be called. That meant everyone had to get up and be ready to take orders. The crew getting a good nights sleep was not a problem that the captain bothered with.
And OP iirc the reason shore people found naval mealtimes hard was that they were usually eating their midday meal with the officers, who by tradition ate last. That meant that if they had an early breakfast (and that would be very, very early in the navy) they might not eat till 1400 or so, by which time they would be (as O’Brien would say) very pinched.
Having toured a couple of wooden warships it looks to me that either hammocks were slung or the crew could eat. You couldn’t do both at the same time.
Aside: If, after reading all of the Napoleonic naval fiction that you can get your hands on and sometimes wishing that you could have sailed the seas during the great age of sail, just go to Portsmouth and tour the HMS Victory. Stand (or stoop really) on the gundeck and then imagine yourself there with 999 other smelly dudes. That’ll cure what ails ya.
Or, if you’re in the US, go to Boston and tour the USS Constitution and imagine 450-500 men and boys crammed on board. (and while you’re there, go up the hill and check out the Bunker Hill memorial).
It’s a romantic impulse that I have often entertained, to be the Doctor on such a voyage. But then, yes, I remember the crowding and the smells and the terrible food.
They have had quite a few Tall Ship recreations, but afaik, none have had the period food. It’s amazing, it’s been calculated the food generated 4-5000 calories. There’s a great book about it.
Rum was always watered, not grog. Grog was traditionally 2 or 3 parts water to one part rum (two- or three-water grog), but as a punishment, you could get six-water grog, which is watered down grog. You still get your rum ration (they aren’t savages, after all) but in a less palatable (apparently) form.
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Not sure where you are getting the 12 and 16 hours?
If you are on the 2nd dog watch you will be eating with the first group of people. The people on the 1st dog watch will eat after the 2nd dog watch.