Bhatia, A.G.
Modern electronic navigation aids - 2nd - Mumbai Lata publications 2001 - 126p.
Decca
Echo sounder
Doppler log
Gyro compass
623.893 / BHA
Modern electronic navigation aids - 2nd - Mumbai Lata publications 2001 - 126p.
Decca
Echo sounder
Doppler log
Gyro compass
623.893 / BHA


