Royal Marine Artillery is a military force that provides support to the Royal Navy and is responsible for defending the UK's territorial waters and overseas territories. Synonyms for Royal Marine Artillery include gunners, artillerymen, and naval artillery. The gunners are one of the most highly trained groups in the military, having undergone a rigorous selection process and training program. They are responsible for operating the Navy's heavy guns, including anti-aircraft and anti-ship weapons, as well as conducting forward observation and surveillance missions. The artillerymen are adept at using explosives, missiles and other long-range weapons to take out enemy targets. Naval artillery refers to the weapons and systems used by the Royal Navy to provide firepower and ensure the safety of their ships on the high seas.