TY  - GEN
AU  - Hobbs, Richard R
TI  - Marine Navigation. Vol 1: Piloting
SN  - 087021358X
U1  - 623.89 
PY  - 1981///
CY  - Maryland
PB  - Naval Institute Press
KW  - Marine Navigation
KW  - Plioting
KW  - Nautical Astronomy
ER  -