Geography and Archipelago

Maritime Geography, Straits and Marine Environment

26 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 26 questions

  1. What is the name of the globally significant oceanographic current system that transports warm, low-salinity water from the Pacific Ocean into the Indian Ocean through Indonesian straits?
  2. How many designated Archipelagic Sea Lanes (Alur Laut Kepulauan Indonesia / ALKI) has the Indonesian government officially established under UNCLOS 1982?
  3. Which shallow continental shelf underlying western Indonesia connected Sumatra, Java, and Borneo to mainland Southeast Asia during Pleistocene glacial periods?
  4. Which continental shelf underlies eastern Indonesia, historically connecting New Guinea and the Aru Islands to the Australian continent?
  5. In July 2017, what official maritime cartographic name did the Indonesian government assign to the northern waters of its EEZ north of the Natuna Islands?
  6. Which major strait connects the South China Sea to the Java Sea, situated between the east coast of Sumatra (Belitung) and the island of Borneo (Kalimantan)?
  7. Which narrow strait separates the islands of Bangka and Belitung in the province of Kepulauan Bangka Belitung?
  8. Which shallow maritime strait separates the northeastern coast of Java from Madura Island, spanned by the landmark 5.4-km Suramadu Bridge?
  9. Which strait connects the Bali Sea in the north to the Indian Ocean in the south, traversed by inter-island ferries between Ketapang (Banyuwangi) and Gilimanuk?
  10. Which strait separates the islands of Lombok and Sumbawa in the province of West Nusa Tenggara?
  11. Which treacherous maritime passage, notorious for violent tidal currents exceeding 8 knots and whirlpools, separates Sumbawa from Komodo Island?
  12. Which deep strait separates the island of Timor from the volcanic islands of Alor and Pantar to the north, forming part of ALKI III?
  13. Which regional sea is situated between the eastern arm of Halmahera Island and the Bird's Head Peninsula of Papua?
  14. Which interior sea basin in eastern Indonesia is bounded by Buru and Seram to the south and the Molucca archipelago to the north?
  15. Which vast, deep enclosed sea in eastern Indonesia, surrounded by the Banda Volcanic Arc, reaches depths of over 7,400 meters at the Weber Deep?
  16. Which marginal sea, bordered by northern Sulawesi, eastern Borneo (Kalimantan), and the Sulu Archipelago, drops to depths exceeding 6,200 meters?
  17. Which shallow continental shelf sea separates the southern coast of New Guinea (Papua) from northern Australia?
  18. Which regional sea basin separates the southern coast of Timor Island from the northwestern continental margin of Australia?
  19. Which archipelago of over 100 small coral islands and cays extends northward into the Java Sea from the coast of Jakarta, functioning as an administrative regency?
  20. Which island group, situated south of Singapore across the Singapore Strait, comprises major industrial and free-trade islands including Batam, Bintan, and Karimun?
  21. Which remote archipelago in the northern Natuna Sea is celebrated for pristine coral atolls, deep lagoons, and award-winning private island eco-resorts?
  22. Which historic volcanic island group in the central Banda Sea was historically the world's only natural habitat and supplier of nutmeg and mace?
  23. Which island in Cenderawasih Bay off the northern coast of Papua served as a massive forward military and naval base for Allied forces during World War II?
  24. Which tiny northernmost outer border island of Indonesia, situated in North Sulawesi near Mindanao, was the subject of the famous 1928 Island of Palmas arbitration?
  25. Which uninhabited outer island, located just southwest of Rote Island in East Nusa Tenggara, constitutes the southernmost point of land territory of the Republic of Indonesia?
  26. Which island situated at the northwestern tip of Sumatra hosts the city of Sabang and the famous Kilometer Zero Monument marking the westernmost point of Indonesia?

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