Apra Harbour, which is located on the central western side of the island, is one of the largest protected harbours in the Pacific and is considered to be the finest deep water port between Hawaii and the Philippines.
位于关岛中西部的阿普拉港是太平洋最大的自然保护港之一，被认为是夏威夷与菲律宾之间的最佳深水港。