List of coastal artillery
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{, class="wikitable sortable" style="font-size:100%;" ! width=15% ,
Caliber In guns, particularly firearms, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel bore – regardless of how or where the bore is measured and whether the finished bore matc ...
(mm) ! width=40% , Weapon name ! width=20% , Country of origin ! width=25% , Period , - , 57 , ,
QF 6 pounder 10 cwt gun The British QF (quick-firing) 6-pounder 10 cwt gun"6 pounder" refers to the approximate weight of projectiles, which was a traditional British way of denoting small guns. "10 cwt" referred to the approximate weight of the gun and breech in cwt (h ...
, , , , World War II , - , 57 , ,
57 55 J The 57 55 J or ''57 mm, 55 caliber length model Jokinen coastal gun'' is a Finnish light coastal gun designed during the Continuation War. It the first coastal gun designed and manufactured completely in Finland and was intended to replace the o ...
, , , , 1950 - 1965 , - , 75 , , 7.5 cm tornpjäs m/57 , , , , 1962 - 2000 , - , 75 , ,
75mm 50 caliber Pattern 1892 The 75 mm 50 caliber Pattern 1892 was a Russian naval gun developed in the years before the Russo-Japanese War that armed the majority of warships of the Imperial Russian Navy during the Russo-Japanese War and World War I. The majority of sh ...
, , , ,
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...
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World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
, - , 76.2 , , QF 12 pounder 12 cwt , , , ,
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...
- World War II , - , 76.2 , , Type 41 8 cm naval gun , , , , World War II , - , 76.2 , ,
3-inch gun M1898 The 3-inch gun M1903 and its predecessors the M1898 and M1902 were rapid fire breech-loading artillery guns with a 360-degree traverse. In some references they are called "15-pounders" due to their projectile weight. They were originally emp ...
, M1902, M1903 , , , , 1899 - 1945 , - , 90 , , 90 mm Gun M1/M2/M3 , , , , World War II , - , 100 , ,
100 56 TK 100 56 TK or 100 TK ("100 mm, 56 length caliber, turret gun") is a Finnish stationary coastal artillery gun that utilizes the tank turret from the Soviet T-55 tank with its 100 mm D-10 tank gun. 100 56 TK was the main light weapon of the Fin ...
, , , , 1969 – 2012 , - , 100 , ,
Canon de 100 mm Modèle 1891 Canon or Canons may refer to: Arts and entertainment * Canon (fiction), the conceptual material accepted as official in a fictional universe by its fan base * Literary canon, an accepted body of works considered as high culture ** Western can ...
, , , , World War I - World War II , - , 105 , , 10.5 cm tornautomatpjäs m/50 , , , , Cold War , - , 120 , , Canon de 120mm L mle 1931 , , , , World War II , - , 120 , ,
4.7 inch gun A 4.7 inch Gun is any of a number of British-built 120 mm naval artillery guns. Several of these guns were designed and manufactured by the Elswick Ordnance Company, part of Armstrong Whitworth Sir W G Armstrong Whitworth & Co Ltd was a major Br ...
, , , , World War I - World War II , - , 120 , ,
12 cm tornautomatpjäs m/70 The 12 cm tornautomatpjäs m/70 ("12 cm automatic turret gun model 1970"), also known as ERSTA (''Ersättning Tungt Artilleri'' or "Replacement Heavy Artillery") was developed to defend vital points like seaports from enemy landing ships ...
, , , , Cold War , - , 120 , ,
120mm 45 caliber Pattern 1892 The 120mm 45 caliber Pattern 1892 was a Russian naval gun developed in the years before the Russo-Japanese War that armed a variety of warships of the Imperial Russian Navy during the Russo-Japanese War and World War I. Guns salvaged from scrappe ...
, , , , World War I - World War II , - , 120 , , 120 mm 50 caliber Pattern 1905 , , , , World War I - World War II , - , 120 , ,
12 cm/45 3rd Year Type naval gun 12 cm/45 3rd Year Type naval gun was a Japanese naval gun and coast defense gun used on destroyers, and torpedo boats of the Imperial Japanese Navy during World War II. Design and development The 12 cm/45 gun designed in 1895 was an in ...
, , , , World War II , - , 120 , , 12 cm 11th Year Type naval gun , , , , World War II , - , 120 , , Type 41 12 cm naval gun , , , , World War II , - , 127 , ,
5-inch gun M1897 The 5-inch gun M1897 (127 mm) and its variant the M1900 were coastal artillery pieces installed to defend major American seaports between 1897 and 1920. For most of their history they were operated by the United States Army Coast Artille ...
, , , , World War I , - , 127 , , 12.7 cm SK C/34 naval gun , , , , 1934 - 2003 , - , 127 , ,
5"/51 caliber gun 5"/51 caliber guns (spoken "five-inch-fifty-one-caliber") initially served as the secondary battery of United States Navy battleships built from 1907 through the 1920s, also serving on other vessels. United States naval gun terminology indicates t ...
, , , , World War I - World War II , - , 130 , ,
130 mm/50 B13 Pattern 1936 The 130 mm/50 B13 Pattern 1936 was a 50 caliber Soviet naval gun. The gun was used as a standard destroyer weapon during World War II, and it was also used as a coastal gun and railway gun. The gun was produced in three different version ...
, , , , World War II - Cold War , - , 130 , ,
130 53 TK 130 53 TK or 130 TK ("130 mm rifled, 53 length caliber, turret gun") is a Finnish fixed, heavy artillery piece, manufactured by Tampella. The caliber is 130 mm. The 130 53 TK is the main weapon of the Finnish coastal artillery. The maximum ...
, , , , Cold War Modern , - , 140 , , 14 cm/50 3rd Year Type naval gun , , , , World War II , - , 145 , , Canon de 145 L modele 1916 Saint-Chamond , , , , World War I - World War II , - , 149.1 , ,
15 cm SK L/45 The 15 cm SK L/45SK - ''Schnelladekanone'' (quick loading cannon); ''L - Länge in Kaliber'' ( length in caliber) was a German naval gun used in World War I and World War II. Naval service The 15 cm SK L/45 was a widely used naval gun ...
, , , ,
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
, - , 149.1 , , 15 cm SK C/28 , , , ,
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
, - , 152 , , BL 6 inch Mk III, IV, VI , , , , 1880 - 1905 , - , 152 , ,
BL 6 inch gun Mk V The BL 6 inch gun Mk V Mk V = Mark 5. Britain used Roman numerals to designate Marks (models) of ordnance until after World War II. Hence this was the fifth model of BL 6-inch gun in British service. was an early Elswick Ordnance Company bree ...
Elswick export gun , , , , 1884 - 1945 , - , 152 , ,
BL 6 inch Mk VII naval gun The BL 6-inch gun Mark VII (and the related Mk VIII) was a British naval gun dating from 1899, which was mounted on a heavy travelling carriage in 1915 for British Army service to become one of the main heavy field guns in the First World War, ...
, , , , World War I - World War II , - , 152 , ,
6-inch gun M1897 The 6-inch gun M1897 (152 mm) and its variants the M1900, M1903, M1905, M1908, and M1 (a.k.a. T2) were coastal artillery pieces installed to defend major American seaports between 1897 and 1945. For most of their history they were operated by ...
, , , , 1897 — 1945 , - , 152 , ,
6"/50 caliber gun The 6"/50 caliber gun Mark 6 and Mark 8 (spoken "six-inch-fifty-caliber") were used for the secondary batteries of the United States Navy's and battleships, as well as the and armored cruisers. They were also used as the main battery on the p ...
, , , , World War II , - , 152 , , 6-inch siege gun M1877 , , , , World War I - World War II , - , 152 , ,
6 inch 35 caliber naval gun 1877 The 6 inch 35 caliber naval gun 1877 was a 152 mm naval gun used by the Russian Empire. The gun was used from 1887 as battleship secondary armament and cruiser armament. The gun was mostly replaced by newer 6 inch 45 caliber Canet gun 18 ...
, , , , 1885 - 1917 , - , 152 , ,
152 mm 45 caliber Pattern 1892 The 152mm 45 caliber Pattern 1892 was a Russian naval gun developed in the years before the Russo-Japanese War that armed a variety of warships of the Imperial Russian Navy during the Russo-Japanese War and World War I. Guns salvaged from scrapp ...
, , , , World War I - World War II , - , 152.4 , , Cannone da 152/45 , , , , World War I - World War II , - , 152 , , Type 41 15 cm/40 naval gun , , , , World War II , - , 152 , , 15 cm/45 41st Year Type , , , , World War II , - , 152 , ,
15 cm/50 41st Year Type The was a naval gun used by the Imperial Japanese Navy before and during World War II. It had a bore with a length of (50 calibre) and fired shell for a distance of (in single mount version) or (in the later twin mounts). The gun was first ...
, , , , World War II , - , 155 , , Canon de 155 L modele 1916 Saint-Chamond , , , , World War I - World War II , - , 155 , , 155 mm gun M1918MI , , , , 1920 - 1945 , - , 155 , , 155 mm gun M1/M2 , , , , World War II , - , 177.8 , ,
RBL 7 inch Armstrong gun The Armstrong RBL 7-inch gun, also known as the 110-pounder, was an early attempt to use William Armstrong's new and innovative rifled breechloading mechanism for heavy rifled guns. Description The Armstrong "screw" breech mechanism used a h ...
, , , , 1861 - ? , - , 177.8 , ,
RML 7 inch gun The RML 7-inch guns were various designs of medium-sized rifled muzzle-loading guns used to arm small to medium-sized British warships in the late 19th century, and some were used ashore for coast defence. Design and history These guns were th ...
, , , , 1865 - ? , - , 180 , ,
180mm Pattern 1931-1933 The 180mm Pattern 1931-1933 were a family of related naval guns of the Soviet Navy in World War II, which were later modified for coastal artillery and railway artillery roles. They were the primary armament of the Soviet Union's first cruisers ...
, , , , World War II , - , 194 , , Canon de 19 C modèle 1870/93 , , , , World War I - World War II , - , 194 , , Canon de 19 C modèle 1875 , , , , World War I , - , 203 , , 8-inch converted rifle , , , , 1864 - 1905 , - , 203 , ,
8-inch mortar M1877 The 8-inch mortar M1877 was a Russian coastal, fortress and siege mortar that was used in the Russo-Japanese War and World War I. History The M1877 was first designed and produced by the Obukhov State Plant in Saint Petersburg and was fairly ...
, , , ,
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...
, - , 203 , , 203mm 45 caliber Pattern 1892 , , , , World War I , - , 203 , ,
203 mm 50 caliber Pattern 1905 The 203 mm 50 caliber Pattern 1905 was a Russian naval gun developed by Vickers for export in the years before World War I that armed a variety of warships of the Imperial Russian Navy. Guns salvaged from scrapped ships found a second life a ...
, , , , World War I , - , 203 , ,
BL 8 inch Mk VII naval gun BL (or similar) may refer to: Arts and entertainment * BL Publishing, a division of the wargames manufacturing company, Games Workshop * ''Boston Legal'', a US legal comedy drama * Boys' love, Japanese term for female-oriented fiction featuring i ...
disappearing gun , , , , 1885 - 1900 , - , 203 , ,
8-inch gun M1888 The 8-inch gun M1888 (203 mm) was a U.S. Army Coast Artillery Corps gun, initially deployed 1898–1908 in about 75 fixed emplacements, usually on a disappearing carriage. During World War I, 37 or 47 of these weapons (references vary) w ...
, , , , 1895 - 1945 , - , 203 , , 8-inch Navy gun MkVIM3A2 , , , , 1941 - 1946 , - , 203 , , 20.3 cm/45 Type 41 naval gun , , , , World War II , - , 210 , , 21 cm SK L/40 , , , , World War II , - , 210 , , 21 cm SK L/45 , , , , World War II , - , 229 , , RML 9 inch Mk VI , , , , 1865 - 1922 , - , 229 , ,
9-inch mortar M1877 The 9-inch mortar M1877 was a Russian coastal, fortress and siege mortar that was used in the Russo-Japanese War and World War I. History The M1877 was first designed and produced by the Obukhov State Plant in Saint Petersburg and was fairly ...
, , , , World War I , - , 234 , , BL 9.2 inch Mk IX & X , , , , 1899 - 1956 , - , 240 , , 24 cm SK L/40 , , , , World War I - World War II , - , 240 , , Canon de 24 C modèle 1876 , , , , World War I , - , 240 , , Canon de 240 modèle 93/96 TAZ , , , , World War I - World War II , - , 254 , , BL 10 inch Mk I , , , , 1885 - 1913 , - , 254 , ,
10-inch gun M1895 The 10-inch Gun M1895 (254 mm) and its variants the M1888 and M1900 were large coastal artillery pieces installed to defend major American seaports between 1895 and 1945. For most of their history they were operated by the United States Arm ...
, , , , 1895 - 1945 , - , 254 , , 254mm 45 caliber Pattern 1891 , , , , 1897 - 1930 , - , 270 , ,
Mortier de 270 mm modèle 1889 The Mortier de 270 mm modèle 1889 sur affût G was a heavy mortar originally employed as coastal artillery and later converted to the siege artillery role. Mle 1889 mortars were used in both the First world war and Second world wars. Hist ...
, , , , World War I - World War II , - , 280 , ,
Obice da 280 The Obice da 280 was an Italian coastal defense and siege howitzer designed in 1884 by the British Armstrong firm and produced under license by the Ansaldo company during the late 1800s. It was used during both the First and Second World Wars. ...
, , , , World War I - World War II , - , 280 , , 28 cm howitzer L/10 , , , ,
Russo-Japanese War The Russo-Japanese War ( ja, 日露戦争, Nichiro sensō, Japanese-Russian War; russian: Ру́сско-япóнская войнá, Rússko-yapónskaya voyná) was fought between the Empire of Japan and the Russian Empire during 1904 and 1 ...
/ World War I / World War II , - , 280 , , 28 cm Küstenhaubitze , , , , 1890 - 1945 , - , 280 , ,
11-inch mortar M1877 The 11-inch mortar M1877 was a Russian coastal and fortress mortar that was used in the Russo-Japanese War and World War I. History The M1877 was first designed and produced by the Obukhov State Plant in Saint Petersburg and was fairly conve ...
, , , , World War I , - , 280 , , 11-inch gun M1877 , , , , World War I , - , 280 , ,
28 cm MRK L/35 The 28 cm MRK L/35 was a German naval gun that was used in World War I as the primary armament of the Brandenburg-class pre-dreadnought battleships. It also saw use as a Coastal-defense gun during World War II. Design The 28 cm MR ...
, , , , 1892 - 1945 , - , 280 , , 28 cm SK L/45 gun , , , , World War II , - , 280 , ,
28 cm SK C/34 naval gun The German 28 cm SK C/34SK - ''Schnelladekanone'' (quick loading cannon); ''C - Construktionsjahr'' (year of design) naval gun was a 283 mm 54.5-caliber built-up gun designed in 1934 used on the and for the planned ''Landkreuzer'' P ...
, , , , World War II - Cold War , - , 305 , ,
Russian 12 inch 40 caliber naval gun The 12-inch 40-caliber naval gun was the standard main weapon of the pre-dreadnought battleships of the Imperial Russian Navy. Sixty-eight guns of the first production run were built in 1895–1906 by the Obukhov Works in Saint Petersburg. They ...
, , , , 1896 - 1916 , - , 305 , ,
Obukhovskii 12"/52 Pattern 1907 gun The Obukhovskii 12"/52 Pattern 1907 gun was a , 52-caliber naval gun. It was the most powerful gun to be mounted aboard battleships of the Imperial Russian Navy and later the Soviet Navy during both world wars. It was later modified by the Sovi ...
, , , , 1914 - 1999 , - , 305 , , BL 12 inch naval gun Mk I – VII , , , , 1882 - 1920 , - , 305 , ,
Type 7 30 cm Howitzer The Type 7 30 cm howitzer ( ja, 七式 三十 榴 弾 砲, Shichi-nenshiki sanjū-senchi ryūdanhō) was a howitzer used by the Imperial Japanese Army in the Second Sino-Japanese War, Soviet–Japanese border conflicts and during the Pacific Cam ...
, , , , 1918 - 1945 , - , 305 , , 12-inch Mk VIII guns , , , , 1921 - 1926 , - , 305 , ,
Obice da 305/17 Obice da 305/17 was an Italian howitzer (sometimes classified as Mortar (weapon), mortar) used during World War I. Produced by the Armstrong works in Italy between 1914 and 1917, approximately 30-44 were built. Originally the Obice da 305/17 Mode ...
howitzer , , , , 1914 - 1959 , - , 305 , ,
12-inch coast defense mortar The 12-inch coast defense mortar was a weapon of caliber emplaced during the 1890s and early 20th century to defend US harbors from seaborne attack. In 1886, when the Endicott Board set forth its initial plan for upgrading the coast defenses of ...
, , , , 1895 - 1945 , - , 305 , ,
12-inch gun M1895 The 12-inch coastal defense gun M1895 (305 mm) and its variants the M1888 and M1900 were large coastal artillery pieces installed to defend major American seaports between 1895 and 1945. For most of their history they were operated by the U ...
, , , , 1895 - 1945 , - , 305 , , 30.5 cm SK L/50 gun , , , , 1909 - 1945 , - , 340 , ,
340mm/45 Modèle 1912 gun The 340mm/45 Modèle 1912 gun (13.4 in) was a heavy naval gun of the French Navy. While the calibres of the naval guns of the French Navy were usually very close to those of their British counterparts, the calibre of 340 mm is specific ...
, , , ,
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
, - , 343 , , BL 13.5 inch naval gun Mk III
disappearing gun A disappearing gun, a gun mounted on a ''disappearing carriage'', is an obsolete type of artillery which enabled a gun to hide from direct fire and observation. The overwhelming majority of carriage designs enabled the gun to rotate back ...
, , , , World War I - World War II , - , 343 , , BL 13.5-inch Mk V
railway gun A railway gun, also called a railroad gun, is a large artillery piece, often surplus naval artillery, mounted on, transported by, and fired from a specially designed railway wagon. Many countries have built railway guns, but the best-known are ...
, , , , World War II , - , 356 , , BL 14 inch Mk VII naval gun , , , ,
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
, - , 356 , ,
14-inch gun M1907 The 14-inch Gun M1907 (356 mm) and its variants the M1907MI, M1909, and M1910 were large coastal artillery pieces installed to defend major American seaports between 1895 and 1945. They were operated by the United States Army Coast Artillery ...
, , , , World War I - World War II , - , 356 , ,
14-inch M1920 railway gun The 14-inch M1920 railway gun was the last model railway gun to be deployed by the United States Army. It was an upgrade of the US Navy 14"/50 caliber railway gun. Only four were deployed; two in the Harbor Defenses of Los Angeles and two ...
, , , , 1925 - 1946 , - , 380 , ,
380 mm/45 Modèle 1935 gun The 380mm/45 Modèle 1935 gun was a heavy naval gun of the French Navy. It was the largest calibre naval gun ever fielded in French service. History The built-up guns were used on the two battleships of the ''Richelieu'' class, ''Richelieu'' a ...
, , , ,
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
, - , 380 , , 38 cm SK L/45 "Max" naval gun , , , ,
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...
, - , 380 , ,
38 cm SK C/34 naval gun The 38 cm SK C/34SK – ''Schnelladekanone'' (quick loading cannon); ''C – Construktionsjahr'' (year of design) naval gun was developed by Germany mid to late 1930s. It armed the s and was planned as the armament of the s and the re-armed s ...
, , , ,
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
, - , 381 , , 15-inch Rodman gun , , , , 1861 - 1905 , - , 381 , , Cannone navale da 381/40 , , , , World War I - World War II , - , 381 , , 38.1 cm/45 Model 1926 , , , , 1926 - 2008 , - , 381 , ,
BL 15 inch Mk I naval gun The BL 15-inch Mark I succeeded the BL 13.5-inch Mk V naval gun. It was the first British 15-inch (381 mm) gun design and the most widely used and longest lasting of any British designs, and arguably the most successful heavy gun ever devel ...
, , , , 1915 - 1959 , - , 406 , ,
RML 16 inch 80 ton gun RML 16-inch 80-ton guns were large rifled muzzle-loading guns intended to give the largest British battleships parity with the large guns being mounted by Italian and French ships in the Mediterranean Sea in the 1870s. Design and history The gun ...
, , , , 1880 - 1902 , - , 406 , ,
16-inch gun M1895 The 16-inch coastal defense gun M1895 was a large artillery piece installed to defend major American seaports. Only one was built and it was installed in Fort Grant on the Pacific side of the Panama Canal Zone. It was operated by the United S ...
, , , , World War I - World War II , - , 406 , ,
16-inch gun M1919 The 16 inch gun M1919 (406 mm) was a large coastal artillery piece installed to defend the United States' major seaports between 1920 and 1946. It was operated by the United States Army Coast Artillery Corps. Only a small number were ...
, , , , 1920 - 1945 , - , 406 , ,
16-inch howitzer M1920 The 16-inch howitzer M1920 (406 mm) was a coastal artillery piece installed to defend major American seaports between 1922 and 1947. They were operated by the United States Army Coast Artillery Corps. They were installed on high-angle barbett ...
, , , , 1922 - 1945 , - , 406 , ,
16"/50 caliber Mark 2 gun The 16"/50 caliber Mark 2 gun and the near-identical Mark 3 were guns originally designed and built for the United States Navy as the main armament for the ''South Dakota''-class battleships and s. The successors to the 16"/45 caliber gun Mark ...
, , , , 1920 - 1945 , - , 406 , , 40.6 cm / SKC 34 Naval gun "Adolf Gun" , , , ,
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
- Cold War , - , 410 , ,
41 cm/45 3rd Year Type naval gun The 41 cm/45 3rd Year Type naval gun was a breech-loading naval gun designed during World War I for the Imperial Japanese Navy. It served as the primary armament in the dreadnoughts completed after the end of the war and in coast defense m ...
, , , , 1920 - 1945 , - , 450 , ,
RML 17.72 inch gun The 100-ton gun (also known as the Armstrong 100-ton gun) was a rifled muzzle-loading (RML) gun made by Elswick Ordnance Company, the armaments division of the British manufacturing company Armstrong Whitworth, owned by William Armstrong. T ...
, , {{UK , , 1877 - 1906


See also

*
List of the largest cannon by caliber The list of cannon by caliber contains all types of cannon through the ages listed in decreasing caliber size. For the purpose of this list, the development of large-calibre artillery can be divided into three periods, based on the kind of projec ...
Coastal The coast, also known as the coastline or seashore, is defined as the area where land meets the ocean, or as a line that forms the boundary between the land and the coastline. The Earth has around of coastline. Coasts are important zones in ...