However, in the mariners' traditional toast or blessing a "following sea", combined with a "fair wind", to a sailor, implies that the winds are comfortable, the sailboat is "running", i.e. sailing with the wind on its stern, and the seas are comfortably rolling in the same direction as the boat is heading, so that the boat seems to be skimming easily on the surface of the water.
A sailor's customary toast or blessing, "following sea" combined with "fair wind", signifies that the winds are favorable, the sailboat is sailing smoothly, and the seas are calm and consistent with the boat's direction of travel, resulting in a smooth and effortless journey on the water.