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كان على المسافرين بين المحيط الهادي والمحيط الأطلنطي أان يدوروا حول رأس هورن عند الطرف الجنوبي لأمريكا الجنوبية قاطعين مسافة 7800 ميل . وبين عامي 1881 ، 1914 تم حفر قناة بنما بتكاليف باهظة عبر برزخ داريين ، فأتاحت للسفن الانتقال بين البحر الكاريبي والمحيط الهادي وهي تستخدم نطاقا من الأهوسة ، وهي عنابر كبيرة ذات بوابات فوق هذا البرزخ الجبلي . وتقطر القاطرات الكهربائية السفن بواسطة حبال قوية أثناء مرورها في كل هويس .

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