Net Casting Day

Net Casting Day (twentieth of Harvest-Tide) is a holiday celebrated along the rugged coastline of the Empire. Cultists of Manann create special, ornamental nets made from the rope of old ships, clothing, and hair. Special prayers are written on cloth and tied onto the nets. The priests then take them out onto the sea, sailing until they can no longer see the land.

After a lengthy prayer, the net is then tossed into the sea three times. Each time it is dragged out of the water, the priests study what is captured in the net as a form of augury. If the nets pull out a solid catch of healthy fish, the signs are clear that there is a bounty to come in the following year.

Source

 * Warhammer Fantasy RPG 2nd ED -- Tome of Salvation pg. 146 pg. 147