00400nam a2200157Ia 4500 200103s9999||||xx |||||||||||||| ||und|| 9780707744513 IMU-MPC Column-12 UK Hydrographic Office Admiralty list of radio signals NP281(1), Vol. 1, 2017/18 UK Hydrographic Office 2018 306 BK 5156 5156 0 0 ddc 0 COLUMN_12 0 6190 MU MU 2020-01-08 Column-12 MPC6163 2020-01-08 BK PERMANANTLY ISSUED TO GMDSS