Coastal erosion
Sapwuahfik has an airstrip that lies just off the island of Ngatik, the Sapwuahfik Civil Airfield (). Coastal erosion has cut the airstrip off from the island by about 20 meters, making it necessary to ferry arriving and departing passengers between it and Ngatik by boat. There are on-call personnel who go to the airfield whenever a flight is expected.