HMS Hydra (A144) the first commission of HMS "Hydra". She was decommissioned and sold to the Indonesian Navy in 1986 and renamed KRI "Dewa Kembar" (Pennant Number 932); she was still in service in 2006. There have been eight ships of the name in the Royal Navy, named for the Hydra of Greek Mythology, a serpent with many heads (though nine is generally accepted as standard), the centre one of which was immortal. The monster was overcome and slain by Hercules. The ship's badge of HMS "Hydra" depicts the monster with seven heads. The ship's motto was "Ut Herculis Perseverantia" ("Like Hercules Persevere").
Heracles "εν γόνασιν"), meaning "on his knees" or "the Kneeler", to the constellation known as Heracles' constellation. The story, among others, is described by Dionysius of Halicarnassus. Before Homer's Trojan War, Heracles had made an expedition to Troy and sacked it. Previously, Poseidon had sent a sea monster to attack Troy. The story is related in several digressions in the "Iliad" (7.451–453, 20.145–148, 21.442–457) and is found in pseudo-Apollodorus' Bibliotheke (2.5.9). This expedition became the theme of the Eastern pediment of the Temple of Aphaea. Laomedon planned on sacrificing his daughter Hesione to Poseidon in the hope of appeasing him. Heracles