The major moon Lannya, sometimes called the Ewe, dominates the night sky over Savits. It also dominates the minor tides -- the everyday rises and falls in sea levels.
Mura, also known as the Wanderer, is more unpredictable -- its position in the sky erratic and its size inconstant. When Mura starts to approach his sister, however, a High Tide is sure to follow.
A lot has been written on Mura's travels, as his comings and goings can raise or topple whole kingdoms. Many have tried to predict his paths, but long-term prediction continues to elude even the best arithmeticians.