157°0'W 157°0'W 156°30'W 156°30'W 156°0'W 156°0'W 155°30'W 155°30'W 155°0'W 155°0'W 154°30'W 154°30'W 18°30'N 18°30'N 19°0'N 19°0'N 19°30'N 19°30'N 20°0'N 20°0'N 20°30'N 20°30'N Bathymetric Atlas of Main Hawaiian Islands -- Hawaii (Big Island) 0 25 Kilometers 0 25 Nautical Miles R/V T. Washington R/V T. Thompson R/V Melville R/V R. Revelle R/V K-O-K R/V Kilo Moana GLORIA SHOALS NOS Single Beam NOS SeaBeam JAMSTEC Seabeam M/V Ocean Alert