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").
Syleus (mythology) tomb. Syleus (mythology) In Greek mythology, Syleus () was a man of Aulis, Lydia killed by Heracles for his nefarious deeds. He was the father of Xenodoce. In most versions Syleus owned a vineyard and forced all passers-by to dig it, which he might have attempted to do to Heracles as well. Heracles killed Syleus with the latter's own hoe and burned his vineyard down to the root. He also killed Xenodice. According to Conon, Syleus had a brother Dicaeus (elsewhere mentioned as the eponym of Dicaea in Thrace); their father was Poseidon. Unlike Syleus, Dicaeus was a just man