Coastal artillery is the branch of the armed forces concerned with operating anti-ship artillery or fixed gun batteries in coastal fortifications.
An Ottoman redoubt of the Dardanelles Fortified Area. The weapon is possibly a German-made 28 cm SK L/40 gun on a coast defense mount.
50-pounder Model 1811 Columbiad (7.25 inch or 184 mm bore) and center-pivot mounting designed by George Bomford as an experimental coastal defense gun. This gun was built in 1811 as a component of the Second System of US fortifications.
Japanese 11-inch howitzer firing; shell visible in flight
One of the three 28 cm main battery guns at Oscarsborg
A boom or a chain is an obstacle strung across a navigable stretch of water to control or block navigation.
Crusaders break a chain protecting the harbour (at left) in the siege of Damietta.
Remains of the great chain that protected the Golden Horn