The patron god of sailors in Greek mythology is Poseidon. As the god of the sea, earthquakes, and horses, Poseidon is revered for his control over maritime elements. Sailors would invoke his favor for safe voyages and bountiful catches, recognizing his immense power and importance to their livelihoods. Symbolized by his trident, Poseidon's role encompasses both creation and destruction in the waters. He embodies the unpredictable nature of the sea and serves as a reminder of the ancient Greeks' deep connection to and reverence for maritime life.