The world I'm working on contains multiple "sub-species" of sentient, European style dragons. When standing on all fours, a human comes up to your typical dragon's shoulders, and they are quadrupedal with opposable thumbs, with four legs and two or four wings, and can reasonably be expected to remain in the air for at least several hours at a time (and that's the low limit for sick or malnourished dragons).
Some dragon species can breathe fire, but no dragon species has inherent fire resistance. There are a few other 'inherent' abilities like ice breath, a venomous tail stinger, breathing underwater, and silk-weaving. Also, some of them have 'superpowers' of sorts that are not normal for their sub-species, such as super-hot scales, telepathy, or the ability to communicate with plants due to circumstances of birth or genetics.
Now that all that is established, let's establish the setting. It's set in a series of scattered islands. Travel between islands without a boat is possible but incredibly risky unless you can breathe underwater, as it's hard to judge distances between islands and easy to get lost out at sea without landmarks. Trade is really important, and piracy abounds.
What technology would these dragons have? What would their boats, sea tactics, and weapons look like? In case you need to know, they're currently in black-powder age technology; firearms do exist but take a long time to reload and are prone to malfunction.