They used computer models to track its path, but until the Russian ship STS Pallada sailing from Honolulu contacted them last month, they had no direct observation of the massive debris field.
Besides, the bubble density and reflectance increased with the wake observation position approaching the target ship.
同时，随着观测点在尾迹中的位置距目标船的接近，气泡密度不断增大，反射率也随之增强。
3
The effective long-range surface observation system should be set up to improve the combat capability and survival capability of surface ship formation.