operational call sign 行動呼號

operational call sign
繁：行動呼號
简：行动呼号

自反送中運動爆發而來，警員身份無法識別問題一直被人批評。警察公共關係科總警司謝振中指，近日部分警員制服上會有一塊「白色的硬卡」，代表警員所屬部隊、小隊及所屬的崗位，名為「行動呼號」。

新設「行動呼號」識別身份　非所有警員適用　謝振中：平衡公眾利益與警察私隱（2019年10月28日）。立場新聞，取自https://thestandnews.com/politics/新設-行動呼號-識別身份-非所有警員適用-謝振中-平衡公眾利益與警察私隱/

In response to public concerns about the identification of officers, Tse said the force had rolled out new “operational call signs”, with staff on the front line wearing white tags on their vests stating their unit and section.

Hong Kong police admit adopting more aggressive tactics in bid to quell rising violence as tensions grow between officers and journalists. (2019, October 28). South China Morning Post. Retrieved from https://www.scmp.com/news/hong-kong/politics/article/3035256/hong-kong-police-admit-adopting-more-aggressive-tactics-bid