TY  - BOOK
AU  - Subramaniam,H.
TI  - Nautical watchkeeping / 
T2  - Nutshell series, bk. 7. 
U1  - 623.8884 23
PY  - 1992///.
CY  - Mumbai : 
PB  - Vijaya, 
KW  - Merchant marine -- Watch duty.
ER  -