导航船 meaning in Chinese

leading ship

Gps global positioning satellite electronic chart enhances steering efficiency by providing real - time notation information to the master
卫星导航船自绘图global positioning satellite帮助船只确定所在位置。
Gps ( global positioning satellite ) electronic chart enhances steering efficiency by providing real - time notation information to the master . this device is especially important during inclement or foggy weather condition
卫星导航船?自绘图（ globalpositioningsatellite ）帮助船只确定所在位置。在天气恶劣或能见度低的日子，发挥功用更大。