Signal Hill is a landmark flat-topped hill located in Cape Town, next to Lion's Head and Table Mountain. Signal flags were used to communicate weather warnings as well as anchoring instructions to visiting ships in order to ensure that they prepared adequately for stormy weather while in the bay. It is known for the Noon Gun that is operated there by the South African Navy. The guns on Signal Hill were used to notify the public when a ship was in trouble and there was a possibility of casualties on the coast near Cape Town. Three guns would be fired from Chavonnes Battery, followed by a single gun in answer from Imhoff Battery.