Explore an island surrounded by the sea. Walk, swim and sail to discover how waves, rivers, volcanoes and corals shape the land.探索一個四面環海的島嶼。步行、游泳和駕船，發掘波浪、河流、火山和珊瑚如何塑造地貌。
🎯 Mission任務Visit all 12 numbered beacons to fill your field notebook, then take the quiz.到訪全部 12 個編號信標，填滿你的考察筆記，然後完成測驗。
W A S D / ↑ ← ↓ →move移動
Shiftrun / sail faster跑步／加速
🖱 draglook around轉動視角
🖱 wheelzoom縮放
Mmap地圖
Nnotebook筆記
O🛰️ overview of the whole island鳥瞰全島
☀️time-of-day slider (⏸ pauses time)時間滑桿（⏸ 暫停時間）
Walk into deep water and you'll get a boat automatically.走進深水時會自動換乘小船。
Language 語言
Graphics畫質
Follows the HKDSE Geography curriculum: river and coastal environments, volcanic hazards and map skills, with coral reefs and the continental shelf as extension. 配合 HKDSE 地理課程：河流及海岸環境、火山災害和地圖技能，另有珊瑚礁和大陸架作延伸學習。This is a model island that brings many landforms together for learning. A real island this size would not have all of them. Not to scale: the explorer is drawn much bigger than real life. 1 grid square = 1 km.這是一個把多種地貌集中起來以供學習的模型島嶼，同樣大小的真實島嶼不會擁有全部地貌。並非按比例：探索者比真實大得多。地圖上 1 格 = 1 公里。
🏝️ Sea Lab海洋實驗室
N
Grid ref方格坐標
Facing面向
☀️ Time時間
Sun太陽
🌊 Tide潮汐
Model note: sun and stars at an equinox, about 18°N. Time runs fast, faster at night. The Moon is not shown. Tides: two high and two low tides a day, as in Hong Kong, but the range is exaggerated (Hong Kong's is about 1–2.5 m), and real tides come about 50 minutes later each day.模型說明：春分或秋分、約北緯 18° 的太陽和星空。時間加快，夜晚更快。沒有顯示月亮。潮汐：與香港一樣每天兩次高潮、兩次低潮，但潮差經誇大（香港約 1–2.5 米），而真實潮汐每天約遲 50 分鐘。
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🗺️ Island map島嶼地圖
Height (low → high)高度（低 → 高）Depth (shallow → deep)水深（淺 → 深）Contour every 100 m等高線（每 100 米）River & tributaries河流與支流Watershed (edge of the river’s drainage basin)分水嶺（流域邊界）Beacon信標You你的位置
WASD move · drag to look · scroll to zoom · M map · O overviewWASD 移動 · 拖曳轉動視角 · 滾輪縮放 · M 地圖 · O 鳥瞰