科学家在船只废墟中一对圆规旁边发现一块香烟盒大小的长方形水晶，表明这是航行设备的一部分。
An oblong crystal the size of a cigarette packet was found on a ship next to a pair of dividers, suggesting that it was part of the navigational equipment.
采用混合GPS辅助航行，该设备能够支持搜索和救援(SAR)操作。
Using hybrid GPS-aided navigation, the unit can support search and rescue (SAR) operations.
中国国防部称，中国海船发现了一具“不明设备”，并为了防止航行安全问题对其进行了检查，而后才发现这是一艘美国无人潜航器。
China's Defence Ministry said a Chinese naval vessel discovered a piece of "unidentified equipment" and checked it to prevent any navigational safety issues before discovering it was a US drone.
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