======Seaway====== The Seaway is a combined viaduct/aqueduct which serves as a boat-traversable access point to [[superfortress|the superfortress]], bypassing the rocky and navigational waters around the island's south shores. ===Geography=== The Seaway is accessible via locks in between the two [[gateway_islands|Gateway Islands]]. It traverses north to the main shore, as well as branches east into the "porthole". ===Construction=== The Seaway and access locks are constructed from the remains of the [[tricourse|Tricourse]]'s south span, specifically pillars C5-C8.