Unverified83% confidenceCautionTime unknown
海上/水上活动优先选浮力型或带浮力挂绳的树脂信号镜，玻璃镜落水即沉且破碎后失去反射功能
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83%
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Long-term
Relevance
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Unverified海上信号镜必须选浮水（floating）设计或带系绳孔，落水后能漂浮或系于手腕；不带浮力且无系绳的镜子落海即失，海上环境不建议购买84% similarUnverified海上/水上活动不要选普通玻璃或金属信号镜，应选可浮于水面的聚碳酸酯漂浮款，否则落水即沉，失去救生意义79% similarUnverified水域活动（钓鱼、划船、潜水标记）必须选明确标注防水的荧光棒，普通派对荧光棒接头处密封性差，浸水后化学液渗漏失效77% similarUnverified主打浮水功能，适合海上皮划艇、帆船等水上活动救生包；若仅用于陆地徒步/登山求生，浮水特性无附加价值，且聚碳酸酯镜面不如玻璃镜面反射强度高77% similarUnverified反射率越高信号越远，但玻璃镜面在背包挤压、跌落时极易碎裂失效；作为唯一求生工具应选聚碳酸酯浮水材质，牺牲部分亮度换取可靠性77% similar
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