Definition
Marine Areas are designated portions of airspace over coastal and offshore waters depicted on aeronautical charts where military operations such as gunnery, missile firing, or fleet exercises may be conducted. They serve a similar function to Military Operations Areas (MOAs) but are located over water rather than over land. Pilots operating under VFR are not prohibited from entering, but should exercise caution and contact the controlling agency for activity status before transit.
Plain English
Marine Areas are zones over the ocean shown on charts where the military may be running exercises like live-fire drills or fleet maneuvers. You can fly through them, but you should check first to see if anything is happening.
Context Anchor
Seen when planning or flying routes near coastlines, islands, bays, offshore waters, or protected water areas shown or noted on aviation charts.
Derivation
Marine comes from the Latin word mare, meaning sea. In aviation, it points the pilot to an area connected with water or the sea, not land-based airspace.
Why Pilots Care
Flying through these zones without following the rules can result in violations or disturbance to protected marine life.
Intuition Check
Marine does not mean this is only for boats. Here, it means a water-based area that can affect how aircraft should fly over or near it.
Example Sentence 1
Before crossing the offshore route, the pilot called the controlling agency to confirm the Marine Area was not active.
Example Sentence 2
A temporary flight restriction was active inside one of the Marine Areas due to whale activity.