diff --git a/schemas/api/stations/board.json b/schemas/api/stations/board.json
index 33fd1ee..00c8a27 100644
--- a/schemas/api/stations/board.json
+++ b/schemas/api/stations/board.json
@@ -63,6 +63,12 @@
                     "title": "RID",
                     "description": "Services RID"
                 },
+                "m": {
+                    "type": "string",
+                    "title": "mode",
+                    "description": "Transport mode, default value: Train",
+                    "enum": ["SHIP", "BUS"]
+                },
                 "o": {
                     "type": "string",
                     "title": "TOC",