TY  - BOOK
AU  - Subramaniam, H. 
TI  - Nautical watchkeeping
U1  - 623.8884  23
PY  - 0000///Vijaya Publications
CY  - Mumbai
PB  - 2019.
KW  - Merchant marine -- Watch duty
KW  - Navigational watchkeeper
KW  - Sea
KW  - Ship
ER  -