Unverified93% confidenceCautionTime unknown
使用时必须在室外且天线朝向天空有开阔视野，在室内、密林、峡谷等遮蔽环境下信号会大幅衰减甚至无法连接
1
Sources
93%
Confidence
Long-term
Relevance
-
First Seen
Sources
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Unverified密林或阴天等低光照环境下信号镜效用大幅下降，不能作为唯一求救手段，需搭配哨子或电子信标79% similarUnverified截止线配光在非铺装路面（山地越野/林道）效果有限，远光照射范围和泛光不如传统山地灯，越野场景不推荐74% similarUnverified反光镜（信号镜）在晴天可反射日光传递数公里的求救信号，是与哨声互补的视觉信号手段；但阴天、夜间、林区无效，不能替代高分贝哨74% similarUnverified单向透视依赖室外光线强于室内的光差原理，阴天、走廊朝向、采光井等低光环境下白天隐私效果也会大幅下降73% similarUnverified属于被动反光片，依赖外部光源照射才能反光，无主动光源环境下（如无路灯的乡间道路）可视性远不如主动发光辐条灯72% similar
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