6 files changed, 47 insertions, 0 deletions
diff --git a/src/script/api/ai_changelog.hpp b/src/script/api/ai_changelog.hpp
index e5699a7d4..f977168e4 100644
--- a/src/script/api/ai_changelog.hpp
+++ b/src/script/api/ai_changelog.hpp
@@ -21,6 +21,11 @@
  * \li AINewGRF
  * \li AINewGRFList
  * \li AIGroup::GetNumVehicles
+ * \li AIMarine::BT_LOCK
+ * \li AIMarine::BT_CANAL
+ * \li AITile::IsSeaTile
+ * \li AITile::IsRiverTile
+ * \li AITile::BT_CLEAR_WATER
  *
  * \b 1.11.0
  *
diff --git a/src/script/api/game_changelog.hpp b/src/script/api/game_changelog.hpp
index d3efea919..8eab8956e 100644
--- a/src/script/api/game_changelog.hpp
+++ b/src/script/api/game_changelog.hpp
@@ -20,6 +20,11 @@
  * API additions:
  * \li GSNewGRF
  * \li GSNewGRFList
+ * \li GSMarine::BT_LOCK
+ * \li GSMarine::BT_CANAL
+ * \li GSTile::IsSeaTile
+ * \li GSTile::IsRiverTile
+ * \li GSTile::BT_CLEAR_WATER
  *
  * \b 1.11.0
  *
diff --git a/src/script/api/script_marine.cpp b/src/script/api/script_marine.cpp
index c63add8fa..16f0228db 100644
--- a/src/script/api/script_marine.cpp
+++ b/src/script/api/script_marine.cpp
@@ -167,6 +167,8 @@
 		case BT_DOCK:  return ::GetPrice(PR_BUILD_STATION_DOCK, 1, nullptr);
 		case BT_DEPOT: return ::GetPrice(PR_BUILD_DEPOT_SHIP, 1, nullptr);
 		case BT_BUOY:  return ::GetPrice(PR_BUILD_WAYPOINT_BUOY, 1, nullptr);
+		case BT_LOCK:  return ::GetPrice(PR_BUILD_LOCK, 1, nullptr);
+		case BT_CANAL: return ::GetPrice(PR_BUILD_CANAL, 1, nullptr);
 		default: return -1;
 	}
 }
diff --git a/src/script/api/script_marine.hpp b/src/script/api/script_marine.hpp
index 324ed8f3e..b3ba02210 100644
--- a/src/script/api/script_marine.hpp
+++ b/src/script/api/script_marine.hpp
@@ -36,6 +36,8 @@ public:
 		BT_DOCK,  ///< Build a dock
 		BT_DEPOT, ///< Build a ship depot
 		BT_BUOY,  ///< Build a buoy
+		BT_LOCK,  ///< Build a lock
+		BT_CANAL, ///< Build a canal
 	};
 
 	/**
diff --git a/src/script/api/script_tile.cpp b/src/script/api/script_tile.cpp
index 360b32c02..90411a7f7 100644
--- a/src/script/api/script_tile.cpp
+++ b/src/script/api/script_tile.cpp
@@ -58,6 +58,20 @@
 	return true;
 }
 
+/* static */ bool ScriptTile::IsSeaTile(TileIndex tile)
+{
+	if (!::IsValidTile(tile)) return false;
+
+	return ::IsTileType(tile, MP_WATER) && ::IsSea(tile);
+}
+
+/* static */ bool ScriptTile::IsRiverTile(TileIndex tile)
+{
+	if (!::IsValidTile(tile)) return false;
+
+	return ::IsTileType(tile, MP_WATER) && ::IsRiver(tile);
+}
+
 /* static */ bool ScriptTile::IsWaterTile(TileIndex tile)
 {
 	if (!::IsValidTile(tile)) return false;
@@ -320,6 +334,7 @@
 		case BT_CLEAR_ROCKY:  return ::GetPrice(PR_CLEAR_ROCKS, 1, nullptr);
 		case BT_CLEAR_FIELDS: return ::GetPrice(PR_CLEAR_FIELDS, 1, nullptr);
 		case BT_CLEAR_HOUSE:  return ::GetPrice(PR_CLEAR_HOUSE, 1, nullptr);
+		case BT_CLEAR_WATER:  return ::GetPrice(PR_CLEAR_WATER, 1, nullptr);
 		default: return -1;
 	}
 }
diff --git a/src/script/api/script_tile.hpp b/src/script/api/script_tile.hpp
index 423044b21..4ee12c691 100644
--- a/src/script/api/script_tile.hpp
+++ b/src/script/api/script_tile.hpp
@@ -119,6 +119,7 @@ public:
 		BT_CLEAR_ROCKY,  ///< Clear a tile with rocks
 		BT_CLEAR_FIELDS, ///< Clear a tile with farm fields
 		BT_CLEAR_HOUSE,  ///< Clear a tile with a house
+		BT_CLEAR_WATER,  ///< Clear a tile with either river or sea
 	};
 
 	/**
@@ -159,10 +160,27 @@ public:
 	static bool IsBuildableRectangle(TileIndex tile, uint width, uint height);
 
 	/**
+	 * Checks whether the given tile is actually a sea tile.
+	 * @param tile The tile to check on.
+	 * @pre ScriptMap::IsValidTile(tile).
+	 * @return True if and only if the tile is a sea tile.
+	 */
+	static bool IsSeaTile(TileIndex tile);
+
+	/**
+	 * Checks whether the given tile is actually a river tile.
+	 * @param tile The tile to check on.
+	 * @pre ScriptMap::IsValidTile(tile).
+	 * @return True if and only if the tile is a river tile.
+	 */
+	static bool IsRiverTile(TileIndex tile);
+
+	/**
 	 * Checks whether the given tile is actually a water tile.
 	 * @param tile The tile to check on.
 	 * @pre ScriptMap::IsValidTile(tile).
 	 * @return True if and only if the tile is a water tile.
+	 * @note Returns false when a buoy is on the tile.
 	 */
 	static bool IsWaterTile(TileIndex tile);