Regulations on the Management and Guidance of the Equipment for Vessel Position Reporting, Catch Reporting, Navigational Chart, and Monitoring Center Article 4

The coordinate system of any electronic navigational chart installed onboard any fishing vessel of distant water fisheries shall be the World Geodetic System, WGS84.
中文原文 船位回報漁獲回報海圖及監督管控中心設備管理輔導辦法第4條
從事遠洋漁業之漁船裝設之電子海圖,其座標系統應為世界大地座標系統八十四(worldgeodeticsystem,WGS84)。

English translation for reference only; the Chinese text prevails. Not legal advice.