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I am trying to establish a few guidelines for a story I recently started jotting down, based in a seafaring city-state. The setting is a fantasy world and I would like to have some degree of realism in how they go from year 0 when the first settlers land on my island in a primitive canoe to year 4000 when they build ships that have a crew of hundreds and use sails as primary propulsion method.

Being ignorant in the matter I looked up the maritime history of the world and tried to sum it up in the following timeline.

  • Year 0: dugout canoe with a simple sail and paddles (fits < 10 people)
  • Year 1000: bigger boats (~20 people as the upper limit), single mast with fixed sail and oars, first examples of sewn plank boats; navigation happens only with good weather and mostly along the coasts, exploration of the rest of the island's coasts
  • Year 2000: more advanced and robust building techniques (either clinker or mortise and tenon), crews reach about 40 people, better tools leading to navigation in more open waters, new settlements on smaller islands located between my city and the mainland
  • Year 2500: the biggest ships have a crew of about 80 people, still employ a single row of oars; they reach the mainland meeting a more advanced and hostile population
  • Year 3000: biremes and triremes, with crews of 100+ sailors, 2 masts with square sails are common, experiments with more masts and sails
  • Year 4000: first ships designed to travel predominantly by sail power

Is this realistic compared to real history examples? Furthermore, which distances from other islands / the mainland would render the timeline of exploration believable? If the timeline is too short I would rather start from a more advanced technology as it makes the most sense for my other assumptions in the development of the city.

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The timeline sounds feasible. I'm more worried about the reason for development at all.

If they are completely isolated, say like the Hawaiian/new Zealand islands. They could exist as a culture in a static state for thousands of years. Why change something that works.

What you definitely need is to be relatively close enough to your other islands and mainland to develop trade and conflict. That's the two main reasons why boats need to be designed bigger and bigger until they are ships.

If there is no trade with others, then ships hulls don't need to be bigger and bigger and the crew size doesn't need to increase. If there is no conflict (probably because there is no trade), there is no need for the boats to be disabled faster and stronger, and the crew size doesn't need to increase.

I'd say for the first few hundred years or s, you can have your island state isolated. Then your small canoes make contact with other distant islands, and a local trade network develops. A few tussles over trade resources and your ships are being designed to carry more people to defend your trade goods.

Then you by your 1500-2000 year mark, they make contact with the mainland. This can be made with 'small' 20 man boats (think viking row boats) but the thing here, the vikings knew there was something out there. They knew England and southern Europe where there. So they weren't sailing into the total unknown. Maybe have your initial settlement save some 'modern' maps, so that your islanders now where to direct their ships.

Once mainland contact is made, more and more trade will develop and more and more conflict will probably ensue. Or at least need to be policed.

So, you need to have interaction more than just time, for your ships to develop. Ships will develop faster in times of conflict as each side tries to out manoeuvre the other.

I might add more when I get back home after work.

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  • $\begingroup$ basic curiosity and growing tribes might lead to a larger demand of fish, leading to bigger canoes. Adventurous individuals, or some mishap with storms, might lead to eventual discovery of foreign lands (the explorers need to find their way back, though). This might serve for the need to develop bigger boats. $\endgroup$ – Burki Aug 23 '16 at 13:05
  • $\begingroup$ Things I excluded from the question that might help: - the remaining area of the island (think big island, e.g. slightly smaller Ireland) is not protected from harsh climate and is therefore not as fertile and rich - the city occupies the most fertile coast of the island, prefers navigation to trade with the rest of the island as they're divided by a steep mountain range (convenient, but another reality check necessary!) - in addition to Burki's points, legends of their origins, temporary fishermen settlements on smaller islands between the bigger one and the mainland, etc. $\endgroup$ – Michele C Aug 23 '16 at 13:19
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    $\begingroup$ Actually, Ireland is way too big, I had another look at similar situations and Fiji sounds perfect. Tons of small islands, a few bigger ones (5000-10000 km^2) with the city-state occupying the east-most shore of its island, on a surface of 100 to 200 km^2 including countryland and small farming villages. Fiji's bigger islands (e.g. Vanua Levu) have a similar orography and climate as well: mountains rising almost from the shoreline, dividing the island in two halves with quite different climates. $\endgroup$ – Michele C Aug 24 '16 at 8:24
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The size of the ship is determined by the needs of the ship builders, and technology is developed to meet these needs. The Polynesian seafarers built super efficient proas which were essentially large sail driven canoes with outriggers and used them to cross the Pacific ocean. For the thousands of years their culture existed, there was no need to build larger vessels, so they remained relatively small.

enter image description here

Ancient galleys grew in size in order to accommodate larger rowing crews and boarding parties, as well as to take the fight to the sea. The Pentaconters (50's) of the Illiad and Odyssey could be considered troopships, since the rowers were the fighters, and the ship was meant to quickly land a raiding party. Triremes were meant to fight at sea, and needed more oar power to build speed for ramming, so were much larger. Galleys in the late classical period were monsters because the main weapons systems had become catapults, which needed large stable platforms to operate:

enter image description here

Pentaconter

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  • trireme *

Trade ships have similar evolutions, as merchants seek to carry greater loads of cargo, while at the same time seeking more efficient sail layouts to minimize the numbers of crewmen needed. A Roman "Roundship" was much larger and heavier than a trireme, yet only carried a fraction of the crew.

enter image description here

Roundship

So you will need to find the compelling need to advance the size and capabilities of ships. Ships are quite capital intensive, so owners will need a serious reason to have them and want to employ them constantly to make up for the massive costs. They will also be quite conservative, and ship designs change relatively slowly until a new idea or need is identified, then a brand new ship type explodes into service.

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