Quote:
Originally Posted by Landwalker
Late though I may be, there's an existing published setting that at least considers this same thing: The Iron Kingdoms, by Privateer Press. I don't remember the exact angles and whatsits and so forth, but the general gist is that the planet has three moons in orbit around it, which are highly different from one another in orbital inclination, mass, and the "severity" of their orbits' elliptical shape. This was used to explain the unpredictable, severe, and very dangerous tidal behavior of the setting's primary ocean, and thus in turn to explain why it had virtually never been traversed.
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Three highly different orbits will result in tidal effects that usually tend to cancel each other out. You'd need to get them regularly pulling together to make additive effects to produce high variation.
Underwater geography tends to have more to do with high and/or swift tides anyway. The Bay of Fundy (79 ft tide) doesn't have any special celestial body that affects it alone.